US2548807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic type pulsator
Assignee: Worcester Foundation for Biomedical Research
•
Filing: 1947-06-21
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Granted: 1951-04-10
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Expires: 1967-06-21
Abstract
No abstract record available.
Inventors
- 👤 Morgan Myles
- 👤 Nicholas T Werthessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:35
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/02; F04B49/00; F04B49/12; F04B53/00; F04B53/14; F04B53/141; F04F; F04F1/00; F04F1/06; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18176; Y10T74/18182; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US558766A
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US1025554A
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GB191412523A
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US1408440A
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US1686109A
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US1998616A
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US2254539A
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US2437821A
Cited
US2398520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |