US3833701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an aural hearing protecting device
Assignee: Marion Health and Safety Inc
•
Filing: 1972-11-06
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Granted: 1974-09-03
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Expires: 1992-11-06
Abstract
Abstract AN AURAL HEARING PROTECTING DEVICE OF FORMED-IN-PLACE ELASTOMERIC COMPOSITION CONSTRUCTED ESPECIALLY TO PROVIDE A SMOOTH, TIGHT SEAL OVER THE MOUTH OF THE EAR CANAL WHEN STRETCHED.
Inventors
- 👤 T Johnson
- 👤 J Sataloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:49
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/06; A61F11/08; Y; Y10; Y10S; Y10S264/00; Y10S264/30
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |