US3598771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane compositions prepared from polyisocyanates and phenol-aldehyde resins
Assignee: Dow Chemical Co
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Filing: 1968-12-04
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Granted: 1971-08-10
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Expires: 1988-12-04
Abstract
Abstract THE INVENTION CONCERNS POLYURETHANE RESINS AND FOAMS DERIVED FROM PHENOL-ALDEHYDE RESINS AND POLYISOCYANATES. IT RELATES MORE PARTICULARLY TO NON-BURNING POLYURETHANE FOAMS OF NOVOLAC RESINS AND POLYISOCYANATES.
Inventors
- 👤 Billy D Davis
- 👤 Elvis E Jones
- 👤 Roy E Morgan Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:45
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4027; C08G18/54; C08G18/542; C08G2110/00; C08G2110/0016; C08G2110/0025; C08G2110/0041; C08G2110/005; C08G2110/0058
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |