US2623870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium salts
Assignee: GAF Chemicals Corp
•
Filing: 1950-01-10
•
Granted: 1952-12-30
•
Expires: 1970-01-10
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:33
CPC Classifications
C; C07; C07C; C07C217/00; C07C217/54; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A SALT OF A QUATERNARY AMMONIUM BASE HAVING THE FORMULA:
Claim 2
Dependent Claim
10 words
A SALT OF A QUATERNARY AMMONIUM BASE HAVING THE FORMULA:
References Cited (Backward Citations)
US2127476A
Cited
US2194429A
Cited
GB467571A
Cited
US2490924A
Cited
US2510063A
Cited
US2510284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |