US3225073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfuric acid semi-ester quaternary ammonium compounds
Assignee: Bayer AG
•
Filing: 1961-10-10
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Granted: 1965-12-21
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Expires: 1981-10-10
Abstract
No abstract record available.
Inventors
- 👤 Glabisch Dietrich
- 👤 Wandel Martin
- 👤 Witte Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:16
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/16; C07; C07C; C07C305/00; C07C305/02; C07C305/04; C07C305/06; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/19; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/19; Y10S260/20; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A QUATERNARY AMMONIUM COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
7 words
A QUATERNARY AMMONIUM COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2129264A
Cited
DE1018421B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |