US3549408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnation of a material based on carbon by molten metals
Assignee: Mersen SA
•
Filing: 1968-03-01
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Granted: 1970-12-22
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Expires: 1988-03-01
Abstract
No abstract record available.
Inventors
- 👤 Roger Bonne
- 👤 Maurice Jacquot
- 👤 Jacques Fourre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:14
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C01; C01B; C01B32/00; C04B35/00; C04B35/515; C04B35/52; C04B41/45; C04B41/50; C04B41/51; C04B41/5183; C04B41/52; C04B41/80; C04B41/81; C04B41/85; C04B41/88; C04B41/89; F; F02; F02K; F02K9/00; F02K9/97; F02K9/974
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA669472A
Cited
US2422215A
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US3160519A
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US2983034A
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US3288573A
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US3396054A
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US3390013A
Cited
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 |