US3477067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ear cup with spring supported resilient seal
Assignee: Gentex Corp
•
Filing: 1966-05-05
•
Granted: 1969-11-11
•
Expires: 1986-05-05
Abstract
No abstract record available.
Inventors
- 👤 Jackson A Aileo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:51
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/16; A42B3/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2593892A
Cited
US2717437A
Cited
US2844820A
Cited
US3021526A
Cited
US3085253A
Cited
US2989598A
Cited
US3148376A
Cited
US3178723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |