Title: Build the Skeleton First! The "Claims-First" Reverse Drafting Strategy to Stop AI Hallucinations
The following content is for those who are not using Patenty.ai.
[Introduction: Why "Description-First" Drafting Fails with AI]
Many practitioners make the mistake of asking AI to "write a full patent application based on this idea." The result? The AI generates a lengthy Background and Detailed Description full of "fluff" or features unrelated to the core invention.
In patent law, the Claims are the blueprint. Building the walls (Description) before drawing the blueprint (Claims) is a recipe for disaster. This is especially critical for satisfying the Written Description Requirement (US) and Support Requirement (EPO).
The golden rule of AI drafting is the "Reverse Process": Finalize Claims $\rightarrow$ Generate Description. By treating the claims as a strict "boundary," the AI is forced to generate content that solely supports the claimed invention. Here are 5 practical prompt cases for different claim types.
Case 1. System/Apparatus Independent Claims: Modular "Block" Expansion
For system claims, the AI should not write a continuous narrative initially. Instead, force it to break down the claim elements into modular sections to ensure Enablement.
[Prompt Template 1]
"Below is the finalized [Claim 1].
[Claim 1]: ...a data collector; a pre-processor for filtering said data; and an analyzer for...
[Instruction]:
Draft the 'Detailed Description' (or 'Description of Embodiments'), but structure it by creating a Sub-heading for each element of Claim 1 (Collector, Pre-processor, Analyzer).
Under each sub-heading, reference the Invention Disclosure Form (IDF) to describe the operation and structure of that specific element in at least 3 sentences.
Constraint: Do not describe components (e.g., 'Display,' 'Transceiver') that are not recited in the claim unless they are necessary for enablement."
Case 2. Method Claims: Locking Sequence and Antecedents
For method claims, the sequence is vital. AI often hallucinates parallel processing or reorders steps, creating New Matter (US) or Added Subject-matter (EP) issues.
[Prompt Template 2]
"Claim 5 is a method claim comprising steps S100, S200, and S300 in chronological order.
[Instruction]:
Draft the description as if explaining a Flowchart.
Prerequisite Check: When describing S200, explicitly state that it receives the output of S100 as input. Ensure the Logical Flow is preserved.
No Assumptions: Unless explicitly stated in the IDF, do not assume steps occur 'simultaneously.' Stick to the serial execution implied by the claim to avoid clarity objections."
Case 3. Dependent Claims: Creating Robust Fallback Positions
Dependent claims define your specific embodiments and fallback positions. Expanding them individually ensures you have support for amendments during prosecution.
[Prompt Template 3]
"Claims 2 through 5 are dependent on Claim 1. Expand each dependent claim into a separate 'Additional Embodiment' paragraph.
For Claim 2 (Material Limitation - e.g., Carbon Fiber): Cite experimental data from the IDF to explain the technical effect (e.g., strength-to-weight ratio) compared to conventional materials.
For Claim 3 (Numerical Range - e.g., 100-200°C): Explain the Criticality of this range. Describe the specific disadvantages (e.g., degradation, inefficiency) that occur below 100°C and above 200°C."
Case 4. Means-Plus-Function (US) / Functional Features (EP)
If you use "Means for X" (US) or functional language, you must disclose the corresponding structure to satisfy 35 U.S.C. § 112(f) and EPO Article 83/84.
[Prompt Template 4]
"Claim 6 includes the limitation 'Calculating Means for [Function]'.
[CRITICAL INSTRUCTION]:
To satisfy 35 U.S.C. § 112(f), the specification MUST disclose the specific structure corresponding to this function.
Search the IDF and explicitly state: 'The calculating means may be implemented as a [Processor/FPGA/ASIC] executing instructions stored in memory.'
Warning: Do not simply repeat the function. You must describe the hardware/algorithm structure that performs it."
Case 5. Markush Groups: Separating Alternative Embodiments
For chemical/biotech claims citing "selected from the group consisting of A, B, and C," lumping them together can obscure the scope. Separate them to ensure Sufficiency of Disclosure across the full breadth.
[Prompt Template 5]
"Claim 8 defines Component X as being 'selected from the group consisting of A, B, and C'.
[Instruction]:
Do not group these into a single vague sentence. Create distinct paragraphs for each alternative:
Embodiment 1: Characteristics and manufacturing process when X is 'A'.
Embodiment 2: Differences when X is 'B'.
Embodiment 3: Differences when X is 'C'.
If the IDF indicates different technical effects for A, B, or C, highlight these differences to support potential future arguments regarding selection inventions."
[Conclusion]
The Claims act as a "containment field" for the AI. By feeding the AI the claims first, you force it to focus on creating a logical, legally supported narrative rather than a creative fiction.
Stop giving the AI a blank canvas. Give it the blueprints (Claims) first.
