Answers · Invention & Disclosures
How do you write an invention disclosure that is useful to a patent attorney?
Updated June 2026
The short answer
Write the document your attorney would otherwise reconstruct at billed rates: the problem, the solution and how it works mechanically, what makes it different from the closest existing approaches, the alternative ways to build it, and how infringement would show up in a competitor's product. In our experience across thousands of filings, disclosures built this way can cut patent prosecution time by 30 to 40 percent.
The test of a good disclosure is simple. Could a patent attorney who has never met the inventor draft a complete application from the document, without rounds of follow-up interviews? If not, those interviews happen anyway, at attorney rates.
The six elements counsel drafts from
First, the problem: what was hard, and why existing approaches fall short. Second, the solution and its point of novelty: how it works at the mechanism level, not just what it achieves, stated explicitly against the closest approaches you know. Mechanism is what matters, so faster or smarter is useless without the how, and the novelty is precisely where your approach departs from the nearest existing technique. Third, alternative embodiments: other architectures, materials, parameter ranges, and implementations that achieve the same result, because these are what broad protection and competitor blocking are built from.
Fourth, commercial context: which products will use the invention and who else would want to. Fifth, detectability: how someone could tell from the outside that a product uses the invention, which weighs heavily in the file-or-trade-secret decision. Sixth, the record: dates, contributors, figures, and any test data. A clear block diagram of the mechanism, paired with precise prose, gives counsel more than either does alone.
Where engineer-written disclosures go wrong
The most common failure is marketing language in place of mechanism: the disclosure says the system is faster and more efficient but never explains the structural change that makes it so. The second is the single-embodiment trap, describing only the version that shipped. Counsel can then claim only that version, and competitors design around a narrow patent easily. The third is novelty by personal unawareness: asserting the idea is new because the inventor has not seen it, with no statement of what the closest known approach is. Counsel then starts the prior art conversation from zero.
Quieter failures cost money too: omitting detectability, burying the invention inside a general product description, and leaving out the negative results and rejected alternatives that often contain the most patentable insight.
What a strong disclosure is worth
Application drafting is commonly the largest single cost in obtaining a patent, and weak input inflates it twice: hours spent reconstructing the invention through interviews, then office actions caused by claims drafted on an incomplete picture. The 30 to 40 percent prosecution-time improvement we see from strong disclosures comes from removing both.
This is the standard our ipDisclosure service drafts to. We interview the inventors, research the prior art context, and deliver a filing-ready document, typically about $7,000 per disclosure and closer to $5,000 in volume programs, excluding attorney and government fees. ipCG is a consultancy, not a law firm: your patent attorney or agent drafts and files the application, and a disclosure built this way makes that work faster.
Related questions
How long should an invention disclosure be?
As long as completeness requires, which is commonly several pages plus figures. Counsel needs enough detail that a skilled engineer could reproduce the invention. Completeness beats polish; bullet points with a good diagram outrank elegant prose missing the mechanism.
Should the inventor write it alone?
Preferably not. Inventors are too close to the work to see what needs explaining, and they undersell alternatives they considered obvious. Pairing the inventor with a facilitator or an IP-experienced reviewer consistently produces stronger documents, which is the model our disclosure service uses.
Should we include prior art we already know about?
Yes. Naming the closest known approaches sharpens the novelty statement and saves counsel hours. Your attorney manages the formal duties of disclosure to the patent office; your job in the document is honesty about what exists.
What does this look like for software inventions?
Architecture and data-flow diagrams, the specific algorithmic or structural step that differs from standard practice, and any performance evidence. Describe the technical problem and technical solution; whether and how to claim it is your counsel's judgment.
Hand your attorney a document they can draft from
We research and write business-grade disclosures that move straight into drafting. Bring us one invention and judge the difference. The discovery call is free.
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ipCapital Group is a consultancy, not a law firm, and nothing on this page is legal advice. Dollar figures on this page are typical market ranges for professional IP services, drawn from published sources and industry experience across a variety of providers. They are not an ipCG quote or rate card; every ipCG engagement is individually scoped and priced. See how our pricing works.