Patent US206648A successfully refreshed from Google Patents.
US2858293A
Expired / Lapsed
US
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Chloroethylene polymers stabilized with b-resorcylic acid diesters
Assignee: Dow Chemical Co
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Filing: 1956-08-02
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Granted: 1958-10-28
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Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Gerald A Clark
- 👤 Carl B Havens
- 👤 Ronald G Brookens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:52
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/134; C08K5/1345
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A LIGHT STABLE COMPOSITION OF MATTER COMPRISING A CHLOROETHYLENE POLYMER NORMALLY SUBJECT TO DISCOLORATION ON EXPOSURE TO LIGHT AND FROM 1 TO 10 PERCENT BY WEIHT BASED ON THE WEIGHT OF SAID MATERIAL OF AN ESTER FALLING WITHIN THE SCOPE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
44 words
A LIGHT STABLE COMPOSITION OF MATTER COMPRISING A CHLOROETHYLENE POLYMER NORMALLY SUBJECT TO DISCOLORATION ON EXPOSURE TO LIGHT AND FROM 1 TO 10 PERCENT BY WEIHT BASED ON THE WEIGHT OF SAID MATERIAL OF AN ESTER FALLING WITHIN THE SCOPE OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2157068A
Cited
US2464250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |