Patent US2708666A successfully refreshed from Google Patents.
US2708666A
Expired / Lapsed
US
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Cationic surface active agents
Assignee: Wyeth Holdings LLC
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Filing: 1953-08-28
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Granted: 1955-05-17
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Expires: 1973-08-28
Abstract
No abstract record available.
Inventors
- 👤 Carpenter Joseph Emmett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:07
CPC Classifications
C; C11; C11C; C11C3/00; C07; C07D; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/16; C11D; C11D1/00; C11D1/38; C11D1/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A QUATERNARY AMMONIUM SALT OF THE STRUCTURE
Claim 2
Dependent Claim
7 words
A QUATERNARY AMMONIUM SALT OF THE STRUCTURE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |