US3536451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for cyclic pulsed pumping and fluid interaction
Assignee: Individual
•
Filing: 1965-01-21
•
Granted: 1970-10-27
•
Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Isadore Ludwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:07
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/32; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/86131; Y10T137/86163; Y10T137/86389; Y10T137/86405; Y10T137/86493; Y10T137/86558; Y10T137/86566
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2291912A
Cited
US3070092A
Cited
US3049122A
Cited
US3183908A
Cited
US3208448A
Cited
US3332746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |