Patent US2689236A successfully refreshed from Google Patents.
US2689236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color stabilizer combination
Assignee: EIDP Inc
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Filing: 1951-01-11
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Granted: 1954-09-14
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Expires: 1971-01-11
Abstract
No abstract record available.
Inventors
- 👤 Myron Q Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:22
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
61 words
AS A NEW COMPOSITION OF MATTER, A MIXTURE COMPRISING AN AMIDE BEING AN N-ACYL SUBSTITUTED SECONDARY AMINE; A SMALL AMOUNT OF A COLOR STABILIZER COMPRISING A MIXTURE OF AN ANHYDRIDE OF AN ORGANIC ACID AND AN ORGANIC SULFUR CONTAINING COMPOUND THAT ACTS AS A THIOL, SAID ANHYDRIDE AND SAID THIOOL BEING PRESENT IN SUBSTANTIALLY EQUAL AMOUNTS; AND A POLYMER OF ACRYLONITRILE.
References Cited (Backward Citations)
US1936562A
Cited
US2502030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |