Wait, hold that amendment! Common mistakes in composition patents

When reading an Office Action, you may sometimes see statements like
“The configuration disclosed in the specification is only 〇+△+□, and it is unclear whether the same effect is achieved if other components are included.”

When you see this sentence,

is what you tend to think.

Especially in composition patents, this judgment can lead to
irreversible consequences later on.

Common failure patterns

Amendments that include "only"

A common sight in responding to Office Actions is
the case of adding “only” or “consisting of” to the claims to limit them.

At first glance, it looks like
“a reasonable response to clear inventive step.”

However, in the case of compositions, this amendment easily leads to problems such as

• the scope of rights becoming extremely narrow

• becoming inconsistent with the actual product (impurities/trace additives)

• making subsequent amendments or counterarguments impossible

.

Why it is dangerous for composition patents

In actual manufacturing sites, it is not rare for compositions to contain

• trace impurities

• by-products derived from manufacturing

• stabilizers or adjusting agents

and the like.

If you amend it to "consisting only of A and B,"
the actual product may fall outside the scope of the claim.

In other words,
it may become a patent that is difficult to use even if it is granted
.

The order to consider before going for an "only" amendment

What is important in responding to reasons for refusal is
not to jump straight into making amendments.

1. Identify the differences

In addition to component names, consider the following perspectives as well.

• Content ranges

• Ratios between components

• Physical property values (viscosity, particle size, molecular weight, etc.)

• State of components (salts, crystal forms, dispersion states, etc.)

2. Review how you read the cited references

There are not a few cases where the examiner's identification of the cited invention is
incorrect
.

By carefully confirming "Is that really the case?",
there are times when you can argue without making an amendment.

3. Organize the relationship with the effects

In composition patents,
the relationship between composition and effects is extremely important.

• Why that range

• Why that combination

If you can explain these,
the differences become "meaningful distinctions."

Only use "only" when it is still necessary

In cases where the essence of the invention lies in
"intentionally not including other components,"
there are cases where limiting with "only" is appropriate.

However, even in that case,

• is there a basis in the specification?

• is it consistent with the examples?

• does it contradict the actual product?

must be carefully verified.

Summary

When responding to reasons for refusal in composition patents,

can lead to major problems later on.
can lead to major problems later on.

In particular, amendments adding "only" should be positioned as a
last resort.

Before amending,

• organizing the differences,

• re-verifying the cited references,

• and examining the relationship with the effects

will make it easier to retain
rights that remain useful even after the patent is granted.

If you are unsure about the amendment strategy

When responding to reasons for refusal in composition patents, there are
amendments that might seem acceptable at the time but have consequences later.

Especially if

• you are unsure whether to include "only",

• or you are worried that amending will narrow your rights

• If you want to confirm that this action won't lead to a point of no return

and you feel that way,
I recommend pausing to organize your thoughts.

▶︎ Click here for inquiries
https://www.millenniapat.com/contact/