US3457225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyurethane compositions from polyoxyalkylene derivatives of p,p'-isopropylidenediphenol
Assignee: Wyandotte Chemicals Corp
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Filing: 1966-07-18
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Granted: 1969-07-22
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Expires: 1986-07-18
Abstract
No abstract record available.
Inventors
- 👤 Adolfas Damusis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:09
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4879; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/905
Claims Analysis
Total Claims: 0
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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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |