US3244667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefins containing a 2-hydroxybenzophenone, a zinc dialkyl-dithiophosphate and optionally a trisphenol alkane as stabilizers
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1962-07-12
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Granted: 1966-04-05
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Expires: 1982-07-12
Abstract
No abstract record available.
Inventors
- 👤 Burgess Robin Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:59
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/0091; C08K5/07; C08K5/49; C08K5/5398
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A POLYMERIC COMPOSITION COMPRISING A SOLID POLYMER OF ALIPHATIC MONO-A-OLEFIN AND A STABILIZER COMPOSITION COMPRISING (A) 2-HYROXY-4-OCYLOXYBENZOPHENONE AND (B) A ZINC DIALKYLDITHIOPHOSPHATE, THE AMOUNT OF SAID BENZOPHENONE BEING FROM 0.1 TO 5% BY WEIGHT OF SAID COMPOSITION AND THERE BEING FROM 0.1 TO 12 MOLES OF SAID BENZOPHENONE FOR EACH SULFUR ATOM PROVIDED TO THE COMPOSITION BY SAID ZINC DIALKYL DITHIOPHOSPHATE.
Claim 2
Dependent Claim
61 words
A POLYMERIC COMPOSITION COMPRISING A SOLID POLYMER OF ALIPHATIC MONO-A-OLEFIN AND A STABILIZER COMPOSITION COMPRISING (A) 2-HYROXY-4-OCYLOXYBENZOPHENONE AND (B) A ZINC DIALKYLDITHIOPHOSPHATE, THE AMOUNT OF SAID BENZOPHENONE BEING FROM 0.1 TO 5% BY WEIGHT OF SAID COMPOSITION AND THERE BEING FROM 0.1 TO 12 MOLES OF SAID BENZOPHENONE FOR EACH SULFUR ATOM PROVIDED TO THE COMPOSITION BY SAID ZINC DIALKYL DITHIOPHOSPHATE.
References Cited (Backward Citations)
US2889295A
Cited
US2964497A
Cited
US3022268A
Cited
US2995540A
Cited
US2947721A
Cited
US2976260A
Cited
US3041311A
Cited
US2965606A
Cited
US2964495A
Cited
US3003996A
Cited
US3033814A
Cited
US3055862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |