US2689178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of porous metal plates
Assignee: Huntington Alloys Corp
•
Filing: 1949-03-24
•
Granted: 1954-09-14
•
Expires: 1969-03-24
Abstract
No abstract record available.
Inventors
- 👤 Hignett Harold William George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:26
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/002; B22F10/00; B22F10/20; B22F3/00; B22F3/10; B22F3/11; H; H01; H01M; H01M4/00; H01M4/02; H01M4/04; H01M4/0402; H01M4/0471; H01M4/24; H01M4/26; H01M4/64; H01M4/70; H01M4/80; H01M4/801; H01M4/803; B22F2998/00; B22F2999/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 0
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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) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |