US2979503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing certain 2-aminophenoldisulfonamides
Assignee: GAF Chemicals Corp
•
Filing: 1957-12-23
•
Granted: 1961-04-11
•
Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 William H Armento
- 👤 William E Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:05
CPC Classifications
C; C09; C09B; C09B39/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A PROCESS FOR PRODUCING A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
9 words
A PROCESS FOR PRODUCING A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2809194A
Cited
US2202219A
Cited
US2333445A
Cited
US2727031A
Cited
US2817655A
Cited
US2804454A
Cited
US2834772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |