US3562816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment mounting means for hearing protector earcups
Assignee: American Optical Corp
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Filing: 1969-06-23
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Granted: 1971-02-16
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Expires: 1989-06-23
Abstract
Abstract HEARING PROTECTOR EARCUP SUPPORTING MEANS INCLUDING A HEADBAND HAVING ATTACHMENT MEANS AT EACH OF ITS OPPOSITE ENDS FOR RECEIVING AND SUPPORTING AN EARCUP. THE ATTACHMENT MEANS IN EACH CASE COMPRISES A FORK HAVING TWO PLANAR PRONGS BETWEEN WHICH A RCESSED END OF AN EARCUP MOUNTING STUD IS FITTED WITH AN INTERMEDIATE THIRD PRONG OF THE FORK EXTENDING OVER AND LATCHED TO THE END OF THE STUD. THE STUD IS EITHER FORMED AS AN INTEGRAL EXTENSION OF THE WALL OF ITS RESPECTIVE EARCUP OR EXTENDED THROUGH THE EARCUP WAL IN COAXIALLY ALIGNED RELATIONSHIP WITH THE CUP SO AS TO PERMIT ROTATION OF THE CUP ABOUT ITS AXIS RELATIVE TO THE HEADBAND.
Inventors
- 👤 Lawrence C Hutchinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:34
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/06; A61F11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |