US3497465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature-stable polyurethane foams and compositions containing derivatives of phenol-aldehyde resins useful for preparing said polyurethanes
Assignee: Hooker Chemical Corp
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Filing: 1966-11-28
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Granted: 1970-02-24
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Expires: 1986-11-28
Abstract
No abstract record available.
Inventors
- 👤 Francis M Kujawa
- 👤 Richard B Tideswell
- 👤 Gerald R Chamberlain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:35
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/388; C08G18/3889; C08G18/40; C08G18/54; C08G18/546; C08G18/65; C08G18/6505; C08G8/00; C08G8/04; C08G8/08; C08G8/16; C08G8/28; C08G8/36; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521
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) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |