Patent US3200757A successfully refreshed from Google Patents.
US3200757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: Individual
•
Filing: 1963-05-01
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Granted: 1965-08-17
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Expires: 1983-05-01
Abstract
No abstract record available.
Inventors
- 👤 Adam P G Steffes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:36
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN A PUMP, A PUMP BODY HAVING AN INTERNAL SHOULDER, A COILED FLAT ELEMENT WITH SAID BODY, AN OUTER ELEMENT RETAINER SURROUNDING THE OUTER PERIPHERY OF SAID COILED ELEMENT ABUTTING SAID SHOULDER AND FIXED WITHIN SAID BODY, AN INNER ELEMENT RETAINER SURROUNDED BY THE INNER PERIPHERY OF SAID COILED ELEMENT, MEANS FOR RECIPROCATING SAID INNER ELEMENT RETAINERS WITHIN SAID BODY, SAID RETAINERS BEING SPACED FROM EACH OTHER A DISTANCE EQUAL TO APPROXIMATELY ONE-HALF THE LENGTH OF THE STROKE.
Claim 2
Dependent Claim
78 words
IN A PUMP, A PUMP BODY HAVING AN INTERNAL SHOULDER, A COILED FLAT ELEMENT WITH SAID BODY, AN OUTER ELEMENT RETAINER SURROUNDING THE OUTER PERIPHERY OF SAID COILED ELEMENT ABUTTING SAID SHOULDER AND FIXED WITHIN SAID BODY, AN INNER ELEMENT RETAINER SURROUNDED BY THE INNER PERIPHERY OF SAID COILED ELEMENT, MEANS FOR RECIPROCATING SAID INNER ELEMENT RETAINERS WITHIN SAID BODY, SAID RETAINERS BEING SPACED FROM EACH OTHER A DISTANCE EQUAL TO APPROXIMATELY ONE-HALF THE LENGTH OF THE STROKE.
References Cited (Backward Citations)
GB283021A
Cited
US2689586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |