Patent US3766148A successfully refreshed from Google Patents.
US3766148A
Expired / Lapsed
US
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Polyurethane elastomers prepared from 4,4 - methylene-bis(cyclohexyl isocyanate),polyol and methylene dianiline
Assignee: Honeywell International Inc
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Filing: 1971-05-17
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Granted: 1973-10-16
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Expires: 1991-05-17
Abstract
Abstract POLYURETHANE ELASTOMERS OF IMPROVED HYDROLYTIC STABILITY ARE OBTAINED FROM 4,4''-METHYLENE-BIS(CYCLOHEXYLISOCVANATE), A POLYOL AND METHYLENE DIANILIN.
Inventors
- 👤 B Taub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:10
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/758; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |