Patent US2495293A successfully refreshed from Google Patents.
US2495293A
Expired / Lapsed
US
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Polymeric polythiols
Assignee: EIDP Inc
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Filing: 1948-02-19
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Granted: 1950-01-24
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Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Samuel L Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:29
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G67/00; C08G67/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A POLYMERIC POLYTHIOL WHICH IS THE REACTION PRODUCT OF THE REDUCTIVE-THIOLATION WITH HYDROGEN AND HYDROGEN SULFIDE AT A TEMPERATURE OF 75* TO 300*C. OF A POLYMER OF 1 MOLAR EQUIVALENT OF CARBON MONOXIDE AND FROM 1 TO 150 MOLAR EQUIVALENTS OF A MONOOLEFIN CONTAINING FROM 2 TO 4 CARBON ATOMS, SAID POLYMERIC POLYTHIOL HAVING A MAIN CHAIN OF CONTIGUOUS CARBON ATOMS AND HAVING THIOL GROUPS AS LATERAL SUBSTITUENT GROUPS THEREON WITH THE SULFUR OF EACH THIOL GROUP DIRECTLY ATTACHED SOLELY TO HYDROGEN AND TO A CARBON ATOM WHICH IS AN INTEGRAL PART OF SAID MAIN CHAIN OF CONTIGUOUS CARBON ATOMS.
Claim 2
Dependent Claim
100 words
A POLYMERIC POLYTHIOL WHICH IS THE REACTION PRODUCT OF THE REDUCTIVE-THIOLATION WITH HYDROGEN AND HYDROGEN SULFIDE AT A TEMPERATURE OF 75* TO 300*C. OF A POLYMER OF 1 MOLAR EQUIVALENT OF CARBON MONOXIDE AND FROM 1 TO 150 MOLAR EQUIVALENTS OF A MONOOLEFIN CONTAINING FROM 2 TO 4 CARBON ATOMS, SAID POLYMERIC POLYTHIOL HAVING A MAIN CHAIN OF CONTIGUOUS CARBON ATOMS AND HAVING THIOL GROUPS AS LATERAL SUBSTITUENT GROUPS THEREON WITH THE SULFUR OF EACH THIOL GROUP DIRECTLY ATTACHED SOLELY TO HYDROGEN AND TO A CARBON ATOM WHICH IS AN INTEGRAL PART OF SAID MAIN CHAIN OF CONTIGUOUS CARBON ATOMS.
References Cited (Backward Citations)
US2402614A
Cited
US2411954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |