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US3109425A
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US
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Respirator speaking diaphragm and exhalation valve unit
Assignee: C & D ACQUISITION CORP A CORP OF DE
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Filing: 1960-03-04
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Granted: 1963-11-05
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Expires: 1980-03-04
Abstract
No abstract record available.
Inventors
- 👤 Vernon F Gongoll
- 👤 Guy G Klinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/08; A62B18/10
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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |