US3508940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight refractory insulation and method of preparing the same
Assignee: National Aeronautics and Space Administration
•
Filing: 1967-02-17
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Granted: 1970-04-28
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Expires: 1987-02-17
Abstract
No abstract record available.
Inventors
- 👤 Hiroshi H Nakamura
- 👤 Harold L Rechter
- 👤 Adi J Mountvala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:23
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C04B35/00; C04B35/01; C04B35/48; C04B2111/00; C04B2111/00474; C04B2111/00482
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2880097A
Cited
US3062669A
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US3041190A
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US3150989A
Cited
US3203813A
Cited
US3413132A
Cited
US3285757A
Cited
US3419495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |