Patent US2725559A successfully refreshed from Google Patents.
US2725559A
Expired / Lapsed
US
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Welder's helmet
Assignee: Individual
•
Filing: 1953-05-04
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Granted: 1955-12-06
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Expires: 1973-05-04
Abstract
No abstract record available.
Inventors
- 👤 Forrest L Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:59
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1298636A
Cited
GB184093A
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US1455025A
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US1820237A
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US2016775A
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US2103006A
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US2169745A
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US2277090A
Cited
US2378887A
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US2487183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |