US3071618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diquaternary ammonium salts of n, n, n', n'-tetra substituted alkylene diamines
Assignee: Pfizer Inc
•
Filing: 1956-02-02
•
Granted: 1963-01-01
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Expires: 1976-02-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Ellis Rex Pinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:20
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A DIQUATERNARY AMMONIUM COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
7 words
A DIQUATERNARY AMMONIUM COMPOUND HAVING THE FORMULA:
References Cited (Backward Citations)
US2634293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |