Patent US4283621B1 successfully refreshed from Google Patents.
US3215665A
Expired / Lapsed
US
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Resinous compositions
Assignee: Wyeth Holdings LLC
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Filing: 1963-03-28
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Granted: 1965-11-02
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Expires: 1983-03-28
Abstract
No abstract record available.
Inventors
- 👤 Robert R Sharetts
- 👤 James A Melchore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A RESINOUS COMPOSITION OF MATTER RESISTANT TO THE DISCOLORING EFFECTS OF LIGHT WHICH COMPRISES A THERMOPLASTIC POLYMER OF A POLYMERIZABLE STYRENE AND FROM ABOUT 0.01% AND 5% OF A 2-HYDROXY-4-OLEFINICOXY BENZOPHENONE WHEREIN THE OLEFINICOXY SUBSTITUENT CONTAINS NOT IN EXCESS OF 4 CARBON ATOMS AND WHEREIN SAID BENZOPHENONE IS A MONOHYDROXY BENZOPHENONE.
Claim 2
Dependent Claim
51 words
A RESINOUS COMPOSITION OF MATTER RESISTANT TO THE DISCOLORING EFFECTS OF LIGHT WHICH COMPRISES A THERMOPLASTIC POLYMER OF A POLYMERIZABLE STYRENE AND FROM ABOUT 0.01% AND 5% OF A 2-HYDROXY-4-OLEFINICOXY BENZOPHENONE WHEREIN THE OLEFINICOXY SUBSTITUENT CONTAINS NOT IN EXCESS OF 4 CARBON ATOMS AND WHEREIN SAID BENZOPHENONE IS A MONOHYDROXY BENZOPHENONE.
References Cited (Backward Citations)
US2777828A
Cited
US2937157A
Cited
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 |