US3440661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cover unit for the window opening of a helmet or goggle
Assignee: Welsh Manufacturing Co
•
Filing: 1967-06-26
•
Granted: 1969-04-29
•
Expires: 1987-06-26
Abstract
No abstract record available.
Inventors
- 👤 William E Newcomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:15
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2055117A
Cited
US2105071A
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US2270028A
Cited
US2251194A
Cited
US2411224A
Cited
US2590526A
Cited
US3147487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |