US3486502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive pressure flow cut-off respiration system
Assignee: Dynasciences Corp
•
Filing: 1966-09-09
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Granted: 1969-12-30
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Expires: 1986-09-09
Abstract
No abstract record available.
Inventors
- 👤 Robert K Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:57
CPC Classifications
F; F16; F16K; F16K15/00; A; A61; A61M; A61M16/00; A61M16/20; A61M16/201; A61M16/206; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2287840A
Cited
US2881757A
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US3039481A
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US3114365A
Cited
US3234932A
Cited
US3212751A
Cited
US3265062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |