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US2820811A
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US
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beta-(5-acenaphthenyl)-acrylonitriles
Assignee: GAF Chemicals Corp
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Filing: 1955-12-13
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Granted: 1958-01-21
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Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Paul E Hoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:16
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
COMPOUNDS OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
5 words
COMPOUNDS OF THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2307700A
Cited
US2286363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |