Patent US2980645A successfully refreshed from Google Patents.
US2980645A
Expired / Lapsed
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Ultraviolet light protected poly-alpha olefin compositions
Assignee: Eastman Kodak Co
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Filing: 1959-05-20
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Granted: 1961-04-18
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Expires: 1979-05-20
Abstract
No abstract record available.
Inventors
- 👤 Gordon C Newland
- 👤 John W Tamblyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132; C08K5/36; C08K5/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A SOLID POLY-A-OLEFIN COMPOSITION COMPRISING POLYETHYLENE CONTAINING .005% TO 5% BY WEIGHT BASED ON SAID POLYETHYLENE OF A STABILIZER COMBINATION COMPRISING ZINC N,N''-DIBUTYLDITHIOCARBAMATE AND 2-HYDROXY-4,4''-DIMETHOXYBENZOPHENONE, THE WEIGHT RATIO OF SAID ZINC N,N''-DIBUTYLDITHIOCARBAMATE TO SAID 2-HYDROXY-4,4''-DIMETHOXYBENZOPHENONE BEING IN THE RANGE OF 1/10 TO 10/1.
Claim 2
Dependent Claim
43 words
A SOLID POLY-A-OLEFIN COMPOSITION COMPRISING POLYETHYLENE CONTAINING .005% TO 5% BY WEIGHT BASED ON SAID POLYETHYLENE OF A STABILIZER COMBINATION COMPRISING ZINC N,N''-DIBUTYLDITHIOCARBAMATE AND 2-HYDROXY-4,4''-DIMETHOXYBENZOPHENONE, THE WEIGHT RATIO OF SAID ZINC N,N''-DIBUTYLDITHIOCARBAMATE TO SAID 2-HYDROXY-4,4''-DIMETHOXYBENZOPHENONE BEING IN THE RANGE OF 1/10 TO 10/1.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |