Patent US3277075A successfully refreshed from Google Patents.
US3277075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyestuffs containing hydroxyethyl-sulfonylmethyl groups
Assignee: GAF Chemicals Corp
•
Filing: 1963-10-21
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Granted: 1966-10-04
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Expires: 1983-10-21
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Mayhew
- 👤 Dolores M Buc
- 👤 Harlan B Freyermuth
- 👤 David I Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:57
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/503
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
5 words
A DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |