US2923809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc cutting of metals
Assignee: Marston Excelsior Ltd
•
Filing: 1958-03-24
•
Granted: 1960-02-02
•
Expires: 1978-03-24
Abstract
No abstract record available.
Inventors
- 👤 Clews Kenneth James
- 👤 Roberts Godfrey Brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:25
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1523667A
Cited
US2360160A
Cited
US2475357A
Cited
US2479092A
Cited
US2510415A
Cited
US2806124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |