US2697728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alicyclic quaternary ammonium salts
Assignee: CIBA PHARM PROD Inc
•
Filing: 1951-07-16
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Granted: 1954-12-21
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Expires: 1971-07-16
Abstract
No abstract record available.
Inventors
- 👤 Charles F Huebner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:02
CPC Classifications
C; C07; C07C; C07C211/00; C07C211/62; C07C211/63
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A BIS QUATERNARY AMMONIUM SALT WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
10 words
A BIS QUATERNARY AMMONIUM SALT WHICH CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |