Patent US3335671A successfully refreshed from Google Patents.
US3335671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping and injection system
Assignee: Union Tank Car Co
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Filing: 1964-04-29
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Granted: 1967-08-15
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Expires: 1984-04-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Schoenecker
- 👤 Robert L Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:17
CPC Classifications
B; B01; B01J; B01J4/00; B01J4/008; F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B43/02; F04B43/025; F04B43/026; F04B53/00; F04B53/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A LIQUID PUMP HAVING A HIGH VOLUMETIC EFFICIENCY AND A CONSTANT PUMPING RATE, COMPRISING: MEANS DEFINING A CYLINDER, CYLINDER HEAD MEANS ON ONE END OF SAID CYLINDER, DIAPHRAGM MEANS IN SAID CYLINDER DEFINING A VARIABLE VOLUME CHAMBER HAVING A CONCAVE ROOF FORMED IN SAID HEAD MEANS AND A CONVEX BASE ON SAID DIAPHRAGM MEANS, SAID CONVEX BASE BEING FORMED OF RESILIENT MATERIAL, PISTON MEANS IN SAID CYLINDER MEANS CONNECTED TO SAID DIAPHRAGM MEANS AND CENTERED UNDER SAID CONVEX BASE FOR RECIPROCATING SAID DIAPHRAGM AND SAID BASE IN SAID CYLINDER MEANS, A SINGLE ACCESS PORT TO SAID VARIABLE VOLUME CHAMBER THROUGH THE CENTER OF SAID CONCAVE ROOF IN AXIAL ALIGNMENT WITH SAID PISTON MEANS, SAID PISTON MEANS BEING ADAPTED TO RECIPROCATE SAID DIAPHRAGM MEANS IN SAID CYLINDER MEANS BETWEEN A WITHDRAWN POSITION AND
Claim 2
Dependent Claim
132 words
A LIQUID PUMP HAVING A HIGH VOLUMETIC EFFICIENCY AND A CONSTANT PUMPING RATE, COMPRISING: MEANS DEFINING A CYLINDER, CYLINDER HEAD MEANS ON ONE END OF SAID CYLINDER, DIAPHRAGM MEANS IN SAID CYLINDER DEFINING A VARIABLE VOLUME CHAMBER HAVING A CONCAVE ROOF FORMED IN SAID HEAD MEANS AND A CONVEX BASE ON SAID DIAPHRAGM MEANS, SAID CONVEX BASE BEING FORMED OF RESILIENT MATERIAL, PISTON MEANS IN SAID CYLINDER MEANS CONNECTED TO SAID DIAPHRAGM MEANS AND CENTERED UNDER SAID CONVEX BASE FOR RECIPROCATING SAID DIAPHRAGM AND SAID BASE IN SAID CYLINDER MEANS, A SINGLE ACCESS PORT TO SAID VARIABLE VOLUME CHAMBER THROUGH THE CENTER OF SAID CONCAVE ROOF IN AXIAL ALIGNMENT WITH SAID PISTON MEANS, SAID PISTON MEANS BEING ADAPTED TO RECIPROCATE SAID DIAPHRAGM MEANS IN SAID CYLINDER MEANS BETWEEN A WITHDRAWN POSITION AND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |