US2952853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for detachably attaching a lens to a face mask
Assignee: Avox Systems Inc
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Filing: 1956-06-26
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Granted: 1960-09-20
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Expires: 1976-06-26
Abstract
No abstract record available.
Inventors
- 👤 Howard A Benzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/12; A; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1184; A61; A61F; A61F9/00; A61F9/02; A61F9/025; A62; A62B; A62B18/00; A62B18/08; A62B18/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |