Patent US3215725A successfully refreshed from Google Patents.
US3215725A
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US
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Bis-alpha-cyano-beta, beta-diphenylacrylic acid derivatives
Assignee: GAF Chemicals Corp
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Filing: 1961-11-02
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Granted: 1965-11-02
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Expires: 1981-11-02
Abstract
No abstract record available.
Inventors
- 👤 Albert F Strobel
- 👤 Sigmund C Catino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:29
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/69; C07C; C07C255/00; C08; C08K; C08K5/00; C08K5/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A COMPOUND DEVOID OF NITRO GROUPS OF THE FORMULA:
Claim 2
Dependent Claim
9 words
A COMPOUND DEVOID OF NITRO GROUPS OF THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |