US2767186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium salts of substi-
Assignee: —
•
Filing: —
•
Granted: 1956-10-16
•
Expires: 1973-10-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:10
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A COMPOUND REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
6 words
A COMPOUND REPRESENTED BY THE FORMULA:
Claim 3
Dependent Claim
8 words
THE PROCESS OF PREPARING COMPOUNDS OF THE FORMULA
Claim 4
Dependent Claim
8 words
THE PROCESS OF PREPARING COMPOUNDS OF THE FORMULA
References Cited (Backward Citations)
FR996427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |