US3846395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastics compositions
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1971-10-26
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Granted: 1974-11-05
•
Expires: 1991-10-26
Abstract
Abstract Thermoplastics compositions contain ketones, thioketones, oximines, imines or hydrazones as prodegradants. The preferred additives are p-laurylacetophenone and p-laurylbenzophenone.
Inventors
- 👤 D Harper
- 👤 J Mckellar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:25
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C08K5/0008; C08K5/0033; Y; Y10; Y10S; Y10S260/00; Y10S260/43
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
51 words
A POLY-ALPHA-OLEFIN COMPOSITION SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS AND COPOLYMERS OF ALPHA-MONOOLEFINS HAVING UP TO 6 CARBON ATOMS WHICH HAS INCORPORATED THEREIN AS PRODEGRADANT 0.001 PERCENT UP TO 10 PERCENT BY WEIGHT OF A KETONE SELECTED FROM THE GROUPCONSISTING OF PLAURALY ACETOPHENONE OR P-LAURLY BENZOPHENONP CONSISOF THE GENERAL FRMULA
Claim 2
Dependent Claim
51 words
A POLY-ALPHA-OLEFIN COMPOSITION SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS AND COPOLYMERS OF ALPHA-MONOOLEFINS HAVING UP TO 6 CARBON ATOMS WHICH HAS INCORPORATED THEREIN AS PRODEGRADANT 0.001 PERCENT UP TO 10 PERCENT BY WEIGHT OF A KETONE SELECTED FROM THE GROUPCONSISTING OF PLAURALY ACETOPHENONE OR P-LAURLY BENZOPHENONP CONSISOF THE GENERAL FRMULA
Claim 3
Dependent Claim
14 words
A composition according to claim 1, in which the prodegradant is an alkyl p-alkylphenylketone.
Claim 4
Dependent Claim
14 words
A composition according to claim 1, in which the prodegradant is a p-lauryl acetophenone.
Claim 5
Dependent Claim
14 words
A composition according to claim 1, in which the prodegradant is a phenyl p-alkylphenylketone.
Claim 6
Dependent Claim
14 words
A composition according to claim 1, in which the prodegradant is a p-lauryl benzophenone.
Claim 7
Dependent Claim
12 words
A composition according to claim 1 in which the poly-alpha-olefin is polyethylene.
References Cited (Backward Citations)
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US3001970A
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US3014799A
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US3300462A
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US3493536A
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US3423484A
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US3642690A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |