US2876190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct anode
Assignee: Union Carbide Corp
•
Filing: 1955-04-18
•
Granted: 1959-03-03
•
Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 John P Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:49
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/06; C23F13/08; C23F13/20; C23F2213/00; C23F2213/30; C23F2213/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1489743A
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US1901088A
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US2022977A
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US2494425A
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US2468785A
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US2638367A
Cited
US2508171A
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US2666027A
Cited
US2777895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |