US3594352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane elastomer compositions prepared from polyarylpolyisocyanates and high molecular weight polyether polyols
Assignee: Texaco Inc
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Filing: 1968-10-01
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Granted: 1971-07-20
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Expires: 1988-10-01
Abstract
Abstract POLYURETHANE ELASTOMER COMPOSITION ARE PREPARED BY REACTING IN A ONE-SHOT PROCESS POLYARYLISOCYANATES HAVING A FUNCTIONALLY GREATER THAN 2.0 WITH POLYETHER POLYOLS HAVING FUNTIONALITIES FROM 3 TO 6 AND MOLECULAR WEIGHT OF ABOUT 5,000 TO 13,000. THE ELASTOMER COMPOSITIONS ARE CHARACTERIZED BY AMBIENT TEMPERATURE CURING AND PHYSICAL PROPERTIES OF GOOD ELONGATION, TEAR STRENGTH, TENSILE STRENGTH AND COMPRESSION LOAD DEFLECTION PROPERTIES AND LOW COMPRESSION SET VALUES. THESE ELASTOMERS ARE USEFUL AS SEALANTS, GASKETS AND SURFACE COATINGS.
Inventors
- 👤 Rodney Frederick Lloyd
- 👤 George Phillip Speranza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4829; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G18/6677; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |