Patent US2900892A successfully refreshed from Google Patents.
US2900892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilators
Assignee: Individual
•
Filing: 1955-11-04
•
Granted: 1959-08-25
•
Expires: 1975-11-04
Abstract
No abstract record available.
Inventors
- 👤 Shepherd Wyley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:58
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/64; F04D29/644; F04D29/646
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US577581A
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US1905599A
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US2054526A
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US2157609A
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US2198420A
Cited
US2279620A
Cited
US2218348A
Cited
US2335508A
Cited
US2332552A
Cited
US2571513A
Cited
US2711682A
Cited
US2666378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |