Diligence in Filing

When a reissue application is filed within 2 years from the date of the

original patent, a rejection on the grounds of lack of diligence or delay in filing the

reissue should not normally be made.

Ex parte Lafferty,

190 USPQ 202

(Bd. App. 1975); but see

Rohm & Haas Co. v.

Roberts Chemical Inc.,

142 F. Supp. 499, 110 USPQ 93 (S.W. Va.

1956),

rev’d on other grounds,

245 F.2d 693, 113 USPQ 423 (4th Cir.

1957).

35 U.S.C. 251

Reissue of defective patents

*****

(d) REISSUE PATENT ENLARGING SCOPE OF CLAIMS.—No

reissued patent shall be granted enlarging the scope of the claims of the original

patent unless applied for within two years from the grant of the original patent.

35 U.S.C. 251(d)

corresponds to the

provisions of

pre-AIA 35

U.S.C. 251

, fourth paragraph.

Where any broadening reissue application is filed within two years from

the date of the original patent,

35 U.S.C. 251

presumes diligence, and

the examiner should not inquire why applicant failed to file the reissue application

earlier within the two year period.

See

MPEP §

1412.03

for broadening reissue practice. See also

In re

Graff,

111 F.3d 874, 42 USPQ2d 1471 (Fed. Cir. 1997);

In re

Bennett,

766 F.2d 524, 528, 226 USPQ 413, 416 (Fed. Cir. 1985);

In re

Fotland,

779 F.2d 31, 228 USPQ 193 (Fed. Cir. 1985).

A reissue application that is filed on the 2-year anniversary date of the

patent grant is considered as being filed within 2 years. See

Switzer v.

Sockman,

333 F.2d 935, 142 USPQ 226 (CCPA 1964) (a similar rule in

interferences).

A reissue application can be granted a filing date without an oath or

declaration, or without the basic filing fee, search fee, or examination fee being present.

See

37 CFR

1.53(f)

. Applicant will be given a period of time to provide the

missing parts and to pay the surcharge under

37 CFR 1.16(f)

.

While examiners should not make rejections based on lack of

diligence (which does not include rejections under

35 U.S.C. 251

for a broadening reissue

that is impermissibly filed outside of the two year time period set in

35 U.S.C

examination fee being present.

See

37 CFR

1.53(f)

. Applicant will be given a period of time to provide the

missing parts and to pay the surcharge under

37 CFR 1.16(f)

.

While examiners should not make rejections based on lack of

diligence (which does not include rejections under

35 U.S.C. 251

for a broadening reissue

that is impermissibly filed outside of the two year time period set in

35 U.S.C. 251

),

courts have looked to see if a reissue applicant was diligent in correcting the error(s) in

the patent. At least one recent decision from the U.S. Court of Appeals for the Federal

Circuit discussed a diligence requirement for filing reissue applications, even narrowing

reissues. See

In re Rosuvastatin Calcium Patent Litigation,

703 F.3d

511, 526, 105 USPQ2d 1437, 1447 (Fed. Cir. 2012). In this case, the majority found the

reissue applicant diligent, but the dissent (J. Mayer) believed that the patentee was not

diligent in filing the narrowing reissue application because the applicant was aware of an

invalidating reference for over six years and had received a rejection in a counterpart

foreign application based on the same reference over two years prior to filing the reissue

application. See 703 F.3d at 537-38, 105 USPQ2d at 1455-56.

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