USRE27376E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller pump heads
Assignee: —
•
Filing: 1970-10-07
•
Granted: 1972-05-30
•
Expires: 1990-10-07
Abstract
Abstract A ROLLER PUMP OF THE TYPE HAVING ONE OR MORE FLEXIBLE TUBULAR PUMPING CHAMBERS CONTINUOUSLY AND SUCCESSIVELY DEPRESSED UNI-DIRECTIONALLY BY TRAVELING PUMPING MEMBERS WHEREIN IMPROVED HEAD ARRANGEMENTS ARE PROVIDED TO FACILITATE REPLACEMENT OF THE PUMPING TUBES AND REMOVAL OF THE PUMPING MEMBER ROTOR.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:31
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1215
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |