Patent US2974141A successfully refreshed from Google Patents.
US2974141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
P-(2-pyrazolin-1-yl) styryl dyes
Assignee: GAF Chemicals Corp
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Filing: 1958-12-17
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Granted: 1961-03-07
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Expires: 1978-12-17
Abstract
No abstract record available.
Inventors
- 👤 Arnold F Plue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:58
CPC Classifications
C; C07; C07D; C07D403/00; C07D403/02; C07D403/10; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/24; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
THE STYRYL DYE OF THE FORMULA:
Claim 2
Dependent Claim
6 words
THE STYRYL DYE OF THE FORMULA:
References Cited (Backward Citations)
US2772943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |