US3205189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl chloride compositions stabilized with a trishydroxy phenylpropane
Assignee: Imperial Chemical Industries Ltd
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Filing: 1961-07-03
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Granted: 1965-09-07
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Expires: 1981-07-03
Abstract
No abstract record available.
Inventors
- 👤 Reed Hugh Wilma Boulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:00
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; C; C08; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A STABILIZED POLYVINYL CHLORIDE COMPOSITION WHICH COMPRISES POLYVINYL CHLORIDE, A PHTHALATE ESTER OF AT LEAST ONE ALKANOL HAVING FROM ABOUT SEVEN TO ABOUT THIRTEEN CARBON ATOMS AS A PLASTICIZER FOR SAID POLYVINYL CHLORIDE, AND A STABILIZING AMOUNT OF A TRIS(HYDROXY-PHENYL)PROPANE COMOUND OF STRUCTURE
Claim 2
Dependent Claim
43 words
A STABILIZED POLYVINYL CHLORIDE COMPOSITION WHICH COMPRISES POLYVINYL CHLORIDE, A PHTHALATE ESTER OF AT LEAST ONE ALKANOL HAVING FROM ABOUT SEVEN TO ABOUT THIRTEEN CARBON ATOMS AS A PLASTICIZER FOR SAID POLYVINYL CHLORIDE, AND A STABILIZING AMOUNT OF A TRIS(HYDROXY-PHENYL)PROPANE COMOUND OF STRUCTURE
References Cited (Backward Citations)
GB702848A
Cited
FR1031083A
Cited
US2885385A
Cited
US2801989A
Cited
US3075940A
Cited
US3091597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |