Patent US2624763A successfully refreshed from Google Patents.
US2624763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-quaternary ammonium compounds
Assignee: F Hoffmann La Roche AG
•
Filing: 1951-06-19
•
Granted: 1953-01-06
•
Expires: 1971-06-19
Abstract
No abstract record available.
Inventors
- 👤 Goldberg Moses Wolf
- 👤 Jampolsky Lester Mischa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:18
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/74; C07C215/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
BIS-QUATERNARY AMMONIUM COMPOUNDS REPRESENTED BY THE FOLLOWING FORMULA
Claim 2
Dependent Claim
8 words
BIS-QUATERNARY AMMONIUM COMPOUNDS REPRESENTED BY THE FOLLOWING FORMULA
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) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |