US2668855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylene-bis(oxyalkylene-ammonium) compounds
Assignee: F Hoffmann La Roche AG
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Filing: 1952-12-20
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Granted: 1954-02-09
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Expires: 1972-12-20
Abstract
No abstract record available.
Inventors
- 👤 Goldberg Moses Wolf
- 👤 Jampolsky Lester Mischa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:17
CPC Classifications
C; C07; C07C; C07C217/00; C07C217/76; C11; C11D; C11D1/00; C11D1/38; C11D1/62; A; A01; A01N; A01N33/00; A01N33/02; A01N33/12; A61; A61K; A61K31/00; A61K31/13; A61K31/14; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/416
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
BIS-QUATERNARY AMMONIUM COMPOUNDS REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
7 words
BIS-QUATERNARY AMMONIUM COMPOUNDS REPRESENTED BY 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) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |