US3467965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding hood ventilator
Assignee: CHALES H BRYANT
•
Filing: 1967-05-29
•
Granted: 1969-09-23
•
Expires: 1987-05-29
Abstract
No abstract record available.
Inventors
- 👤 John D Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:58
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; A61F9/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1999639A
Cited
US2402820A
Cited
US2447433A
Cited
US2688962A
Cited
US3098233A
Cited
US3181532A
Cited
US3353191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |