US3436016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature responsive ventilator with coiled leaf spring
Assignee: RALPH S EDWARDS
•
Filing: 1967-12-12
•
Granted: 1969-04-01
•
Expires: 1987-12-12
Abstract
No abstract record available.
Inventors
- 👤 Ralph S Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:35
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US302215A
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US2187767A
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US1335929A
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US2117529A
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US2216873A
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US2241108A
Cited
US2551965A
Cited
US3068776A
Cited
US3195441A
Cited
FR1377998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |