US2540457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making metal articles and products
Assignee: Isthmian Metals Inc
•
Filing: 1945-12-05
•
Granted: 1951-02-06
•
Expires: 1965-12-05
Abstract
No abstract record available.
Inventors
- 👤 Richard E Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:14
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/16; Y; Y10; Y10S; Y10S264/00; Y10S264/66; Y10S425/00; Y10S425/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19309E
Cited
US1510745A
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US1599085A
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US2105070A
Cited
US2199620A
Cited
US2300302A
Cited
US2331909A
Cited
US2375068A
Cited
US2387073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |