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US2766233A
Expired / Lapsed
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Polymethine dyes for synthetic fibers
Assignee: GAF Chemicals Corp
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Filing: 1953-12-11
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Granted: 1956-10-09
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Expires: 1973-12-11
Abstract
No abstract record available.
Inventors
- 👤 Nicholas J Kartinos
- 👤 James B Normington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B23/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
POLYMETHINE DYESTUFFS SELECTED FROM THE CLASS CONSISTING OF THE FOLLOWING FORMULAE:
Claim 2
Dependent Claim
11 words
POLYMETHINE DYESTUFFS SELECTED FROM THE CLASS CONSISTING OF THE FOLLOWING FORMULAE:
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) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |