Patent US3301189A successfully refreshed from Google Patents.
US3301189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable capacity pump
Assignee: Technicon Chromatography Corp
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Filing: 1964-04-22
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Granted: 1967-01-31
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Expires: 1984-04-22
Abstract
No abstract record available.
Inventors
- 👤 Nelson G Kling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:28
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/06; F04B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PUMP COMPRISING A CYLINDER; VALVE MEANS COUPLED TO SAID CYLINDER FOR THE INTAKE AND OUTPUT OF FLUID TO SAID CYLINDER; A PISTON RECIPROCABLE IN SAID CYLINDER IN FLUID INTAKE AND OUTPUT DIRECTIONS; SPRING MEANS BIASING SAID PISTON IN SAID FLUID INTAKE DIRECTION; AND PISTON ACTUATING MEANS INCLUDING A ROD JOURNALED ADJACENT EACH END FOR RECIPROCATION ON AN AXIS COMMON WITH SAID PISTON AND HAVING ONE END FOR ABUTMENT AGAINST AN END OF SAID PISTON AGAINST THE BIAS OF SAID SPRING MEANS, A PROJECTION FIXED TO SAID ROD, A CAM JOURNALED FOR PERIPHERAL ABUTMENT AGAINST
Claim 2
Dependent Claim
95 words
A PUMP COMPRISING A CYLINDER; VALVE MEANS COUPLED TO SAID CYLINDER FOR THE INTAKE AND OUTPUT OF FLUID TO SAID CYLINDER; A PISTON RECIPROCABLE IN SAID CYLINDER IN FLUID INTAKE AND OUTPUT DIRECTIONS; SPRING MEANS BIASING SAID PISTON IN SAID FLUID INTAKE DIRECTION; AND PISTON ACTUATING MEANS INCLUDING A ROD JOURNALED ADJACENT EACH END FOR RECIPROCATION ON AN AXIS COMMON WITH SAID PISTON AND HAVING ONE END FOR ABUTMENT AGAINST AN END OF SAID PISTON AGAINST THE BIAS OF SAID SPRING MEANS, A PROJECTION FIXED TO SAID ROD, A CAM JOURNALED FOR PERIPHERAL ABUTMENT AGAINST
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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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |