US2644068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding device
Assignee: Graham Manufacturing Corp
•
Filing: 1950-01-17
•
Granted: 1953-06-30
•
Expires: 1970-01-17
Abstract
No abstract record available.
Inventors
- 👤 Harold J Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:58
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/20; B23K9/201
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1174446A
Cited
US1273203A
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US1861005A
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US2110832A
Cited
US2383695A
Cited
US2272968A
Cited
US2402275A
Cited
US2473927A
Cited
US2510101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |