US2926357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick-coupling welding helment and headgear combination
Assignee: Individual
•
Filing: 1956-12-31
•
Granted: 1960-03-01
•
Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Edwards George Zahnor
- 👤 George A Langford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:05
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22; A42B3/225; A61; A61F; A61F9/00; A61F9/04; A61F9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US373860A
Cited
US1385039A
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US2362610A
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US2384765A
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US2416764A
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US2402431A
Cited
US2447083A
Cited
US2578171A
Cited
US2788558A
Cited
US2801420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |