Patent US2962386A successfully refreshed from Google Patents.
US2962386A
Expired / Lapsed
US
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Method of making impervious carbon articles
Assignee: Union Carbide Corp
•
Filing: 1957-03-08
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Granted: 1960-11-29
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Expires: 1977-03-08
Abstract
No abstract record available.
Inventors
- 👤 Phillip B Doll
- 👤 Michael A Bobal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:56
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/521; C04B41/00; C04B41/45; C04B41/50; C04B41/5001; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 0
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GB757883A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |