Patent US3148181A successfully refreshed from Google Patents.
US3148181A
Expired / Lapsed
US
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Azo dyes containing quaternary ammonium substituents
Assignee: GAF Chemicals Corp
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Filing: 1961-04-13
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Granted: 1964-09-08
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Expires: 1981-04-13
Abstract
No abstract record available.
Inventors
- 👤 William E Wallace
- 👤 William H Armento
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:31
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/021; C09B35/025; C09B43/00; C09B43/12; C09B43/124; C09B43/128; C09B44/00; C09B44/02; C09B44/04; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A WATER-SOLUBLE DYESTUFF HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
7 words
A WATER-SOLUBLE DYESTUFF HAVING 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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |