US2471719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic welder's hood control
Assignee: Individual
•
Filing: 1946-01-19
•
Granted: 1949-05-31
•
Expires: 1966-01-19
Abstract
No abstract record available.
Inventors
- 👤 Wilgus S Broffitt
- 👤 Homer F Montague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:32
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; A61F9/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2036224A
Cited
US2384517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |