US3549564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyurethane foams for fuel-fire
Assignee: National Aeronautics and Space Administration
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Filing: 1968-02-05
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Granted: 1970-12-22
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Expires: 1988-02-05
Abstract
No abstract record available.
Inventors
- 👤 John A Parker
- 👤 Salvatore R Riccitiello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:09
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08J9/0061; C08K; C08K3/00; C08K3/38; C08K9/00; C08K9/10; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L57/00; C08L57/06; C08L57/08; C08L75/00; C08L75/04; C08J2375/00; C08J2375/04
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |