US2909647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide range power supply system for welding equipment
Assignee: GLENN PACIFIC POWER SUPPLY COR
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Filing: 1957-01-18
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Granted: 1959-10-20
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Expires: 1977-01-18
Abstract
No abstract record available.
Inventors
- 👤 George G Glenn
- 👤 William W Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:53
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/10; B23K9/1006; B23K9/1012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1452857A
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US1959513A
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US2322709A
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US2542852A
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US2763771A
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US2800571A
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US2777047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |