Patent US882403A successfully refreshed from Google Patents.
Patent US2563640A successfully refreshed from Google Patents.
US2563640A
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US
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Chemical aftertreatment of high polymers containing cyano groups using ammonia and a hydrosulfide
Assignee: EIDP Inc
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Filing: 1947-05-02
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Granted: 1951-08-07
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Expires: 1967-05-02
Abstract
No abstract record available.
Inventors
- 👤 Brown Robert Lowry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:48
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/51; D06M11/53; C; C08; C08J; C08J7/00; C08J7/12; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C08J2333/00; C08J2333/18; C08J2333/20; D06M2101/00; D06M2101/16; D06M2101/18; D06M2101/26; D06M2101/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR INSOLUBILIZING POLYMERIC STRUCTURES PREPARED FROM POLYMERS HAVING A PLURALITY OF NITRILE GROUPS ATTACHED TO THE POLYMER CHAIN BY HEATING, AT A TEMPERATURE OF ABOUT 100* C. TO ABOUT 150* C., SAID STRUCTURES IN A CARRIER WHICH IS INERT TO SAID STRUCTURES AND WHICH CONTAINS AMMONIA AND A HYDROSULFIDE IN MOLAR CONCENTRATION BETWEEN ABOUT 0.4 AND ABOUT 1.0, THEREBY INSOLUBILIZING SAID STRUCTURES.
Claim 2
Dependent Claim
64 words
A PROCESS FOR INSOLUBILIZING POLYMERIC STRUCTURES PREPARED FROM POLYMERS HAVING A PLURALITY OF NITRILE GROUPS ATTACHED TO THE POLYMER CHAIN BY HEATING, AT A TEMPERATURE OF ABOUT 100* C. TO ABOUT 150* C., SAID STRUCTURES IN A CARRIER WHICH IS INERT TO SAID STRUCTURES AND WHICH CONTAINS AMMONIA AND A HYDROSULFIDE IN MOLAR CONCENTRATION BETWEEN ABOUT 0.4 AND ABOUT 1.0, THEREBY INSOLUBILIZING SAID STRUCTURES.
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) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |