US3200143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium compounds
Assignee: SmithKline Beecham Corp
•
Filing: 1959-11-10
•
Granted: 1965-08-10
•
Expires: 1979-11-10
Abstract
No abstract record available.
Inventors
- 👤 Copp Frederick Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:23
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/20; C07D295/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A QUARTERNARY AMMONIUM SALT OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
A QUARTERNARY AMMONIUM SALT OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2899459A
Cited
US2336465A
Cited
US2581336A
Cited
US2743210A
Cited
US2909457A
Cited
US2918401A
Cited
US2887509A
Cited
US2976319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |