Patent US3062831A successfully refreshed from Google Patents.
US3062831A
Expired / Lapsed
US
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Phthalocyanine dyestuffs
Assignee: GAF Chemicals Corp
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Filing: 1959-12-30
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Granted: 1962-11-06
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Expires: 1979-12-30
Abstract
No abstract record available.
Inventors
- 👤 Harlan B Freyermuth
- 👤 Raymond L Mayhew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:01
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/503; C09B62/517; C09B47/00; C09B47/04; C09B47/08; C09B47/24; C09B47/26; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A PHTHALOCYANINE DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
A PHTHALOCYANINE DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2300572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |