US2919259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light stabilized polyvinyl chloride compositions
Assignee: Individual
•
Filing: 1956-08-22
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Granted: 1959-12-29
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Expires: 1976-08-22
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Naylor
- 👤 William B Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A COMPOSITION OF MATTER COMPRISING A POLYVINYL CHLORIDE AND AS A LIGHT-STABLILIZER THEREFOR, FROM ABOUT 0.01% TO 5% BASED ON THE WEIGHT OF SAID POLYVINYL CHLORIDE OF EACH OF AN ORTHOHYDROXY BENZOPHENONE SELECTED FROM THE GROUP CONSISTING OF 2-HYDROXY-4-METHOXY BENZOPHENONE, 2,2''-DIHYDROXY-4,4''- DIMETHOXY BENZOPHENONE AND 2,2''-DIHYDROXY-4-METHOXY BENZOPHENONE, AND A PHENOLIC ANTIOXIDANT WHICH IS A SYMMETRICAL 2,2'' METHYLENE BIS PHENOL SUBSTITUTED IN THE NUMBER 4 POSITIONS WITH AN ALKYL GROUP OF FROM 1 TO 2 CARBON ATOMS AND IN THE NUMBER 6 POSITION WITH A TERTIARY ALKYL GROUP OF FROM 4 TO 5 CARBON ATOMS.
Claim 2
Dependent Claim
93 words
A COMPOSITION OF MATTER COMPRISING A POLYVINYL CHLORIDE AND AS A LIGHT-STABLILIZER THEREFOR, FROM ABOUT 0.01% TO 5% BASED ON THE WEIGHT OF SAID POLYVINYL CHLORIDE OF EACH OF AN ORTHOHYDROXY BENZOPHENONE SELECTED FROM THE GROUP CONSISTING OF 2-HYDROXY-4-METHOXY BENZOPHENONE, 2,2''-DIHYDROXY-4,4''- DIMETHOXY BENZOPHENONE AND 2,2''-DIHYDROXY-4-METHOXY BENZOPHENONE, AND A PHENOLIC ANTIOXIDANT WHICH IS A SYMMETRICAL 2,2'' METHYLENE BIS PHENOL SUBSTITUTED IN THE NUMBER 4 POSITIONS WITH AN ALKYL GROUP OF FROM 1 TO 2 CARBON ATOMS AND IN THE NUMBER 6 POSITION WITH A TERTIARY ALKYL GROUP OF FROM 4 TO 5 CARBON ATOMS.
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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |