US2569326A
Expired / Lapsed
US
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Unsymmetrical quaternary ammonium alkyl sulfates
Assignee: J B Niederl & Associates Inc
•
Filing: 1948-07-30
•
Granted: 1951-09-25
•
Expires: 1968-07-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Niederl
- 👤 William F Hart
- 👤 Martin E Mcgreal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:12
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/037; C07D295/04; C07D295/08; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
QUATERNARY AMMONIUM ALKYL SULFATES OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
8 words
QUATERNARY AMMONIUM ALKYL SULFATES OF THE FOLLOWING FORMULA:
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |