US2771469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium salts of deltahydrocarbyoxyphenyl gamma-hydroxy amines
Assignee: Merck and Co Inc
•
Filing: 1953-12-30
•
Granted: 1956-11-20
•
Expires: 1973-12-30
Abstract
No abstract record available.
Inventors
- 👤 Everett M Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:25
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/092
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A QUATERNARY AMMONIUM SALT HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
8 words
A QUATERNARY AMMONIUM SALT HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
US2665278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |