US2520193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve control system for scarfing machines
Assignee: Airco Inc
•
Filing: 1946-04-27
•
Granted: 1950-08-29
•
Expires: 1966-04-27
Abstract
No abstract record available.
Inventors
- 👤 Begerow Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:34
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2290626A
Cited
US2177276A
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US2293802A
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US2244822A
Cited
US2290283A
Cited
US2290271A
Cited
US2277054A
Cited
US2424270A
Cited
US2448657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |