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US2858296A
Expired / Lapsed
US
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Vulcanization of polyurethane elastomers with diisocyanates
Assignee: EIDP Inc
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Filing: 1955-02-17
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Granted: 1958-10-28
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Expires: 1975-02-17
Abstract
No abstract record available.
Inventors
- 👤 Frederic B Stilmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:54
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7825; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
THE PROCESS OF CURING A STABLE UNCURED POLYURETHANE REACTION PRODUCT, WHICH IS CURABLE BY HEATING WITH A POLYISOCYANATE AND WHICH CONTAINS SUBSTANTIALLY NO FREE ISOCYANATE GROUP, SAID POLYURETHANE REACTION PRODUCT CONTAINING A PLURALITY OF INTRALINEAR RADICALS OF THE FORMULA
Claim 2
Dependent Claim
39 words
THE PROCESS OF CURING A STABLE UNCURED POLYURETHANE REACTION PRODUCT, WHICH IS CURABLE BY HEATING WITH A POLYISOCYANATE AND WHICH CONTAINS SUBSTANTIALLY NO FREE ISOCYANATE GROUP, SAID POLYURETHANE REACTION PRODUCT CONTAINING A PLURALITY OF INTRALINEAR RADICALS OF THE FORMULA
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) | 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 |