US3432336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnation of graphite with refractory carbides
Assignee: Boeing North American Inc
•
Filing: 1964-08-25
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Granted: 1969-03-11
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 Kasimir Langrod
- 👤 Sherman Oaks
- 👤 Robert L Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:34
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5053; C04B41/5057; C04B41/80; C04B41/81; C04B41/85; C04B41/87
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA680237A
Cited
US2917404A
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US2939803A
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US2978358A
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US3151852A
Cited
US3073717A
Cited
US3042822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |