Patent US3288786A successfully refreshed from Google Patents.
US3288786A
Expired / Lapsed
US
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Naphthotriazole optical brighteners
Assignee: GAF Chemicals Corp
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Filing: 1962-09-10
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Granted: 1966-11-29
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Albert F Strobel
- 👤 Sigmund C Catino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:41
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/16; C07D249/22; C07D249/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A FLUORESCENT NAPHTHOTRIAZOLE HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
7 words
A FLUORESCENT NAPHTHOTRIAZOLE 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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |