Patent US5204214A successfully refreshed from Google Patents.
US2500111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azanol dyes
Assignee: GAF Chemicals Corp
•
Filing: 1946-08-09
•
Granted: 1950-03-07
•
Expires: 1966-08-09
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Anish
- 👤 Lee C Hensley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:49
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/16; C09B23/162; C09B23/166; C09B23/0066; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/102; G03C1/76; G03C1/825; G03C1/83; G03C1/832
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AZANOL DYES CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
AZANOL DYES CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2307049A
Cited
US2340882A
Cited
US2368305A
Cited
US2186608A
Cited
US2274782A
Cited
US2345193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |