Patent US1346794A successfully refreshed from Google Patents.
US3418658A
Expired / Lapsed
US
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Two component ventilator
Assignee: United Carr Inc
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Filing: 1967-04-10
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Granted: 1968-12-31
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Expires: 1987-04-10
Abstract
No abstract record available.
Inventors
- 👤 Henry F Danico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:44
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/02; A61F9/028; A44; A44B; A44B17/00; A44B17/0029; A62; A62B; A62B18/00; A62B18/08; F; F16; F16B; F16B21/00; F16B21/06; F16B5/00
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) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |