US2392682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for decreasing the permeability of fabricated carbon shapes
Assignee: Arthur D Little Inc
•
Filing: 1943-01-11
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Granted: 1946-01-08
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Expires: 1963-01-11
Abstract
No abstract record available.
Inventors
- 👤 Leroy F Marek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:00
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5001; C04B41/80; C04B41/81; C04B41/85; Y; Y10; Y10S; Y10S60/00; Y10S60/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-01-07 | 1949-07-09 | 1950-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-01-07 | 1953-07-09 | 1954-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-01-07 | 1957-07-09 | 1958-01-08 | $7700.00 | Window Closed / Lapsed |