US3109293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for handling liquefied gases
Assignee: CHEMCTRON Corp
•
Filing: 1959-06-29
•
Granted: 1963-11-05
•
Expires: 1979-06-29
Abstract
No abstract record available.
Inventors
- 👤 David A Williams
- 👤 Lester C Browning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:12
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/06; F04B15/08; F04B53/00; F04B53/14; F04B53/16; F04B53/162; F04B53/164; F04B53/166; Y; Y10; Y10S; Y10S277/00; Y10S277/931; Y10S417/00; Y10S417/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD OF OPERATING A LIQUEFIED GAS PUMP OF THE TYPE HAVING A CYLINDER EXTENDING INTO A LIQUID SUMP CONNECTED TO A TANK OF LIQUEFIED GAS AND EMPLOYING A RECIPROCATING PISTON MOUNTED ADJACENT A CYLINDRICAL WEAR SURFACE AND INCLUDING A PISTON RING CARRIED BY THE PISTON AND INTERPOSED BETWEEN THE PISTON AND THE WEAR SURFACE TO PREVENT THE FLOW OF LIQUEFIED GAS, SAID PISTON RING BEING FORMED OF A MATERIAL WHICH IS VERY HARD AND RESISTANT TO WEAR OF CRYOGENIC TEMPERATURES BUT WHICH EXHIBITS PLASTIC FLOW AT TEMPERATURES NEAR THE AMBIENT FOR THE PUMP, SAID METHOD COMPRISING THE STEPS OF OPERATING SAID
Claim 2
Independent Claim
102 words
A METHOD OF OPERATING A LIQUEFIED GAS PUMP OF THE TYPE HAVING A CYLINDER EXTENDING INTO A LIQUID SUMP CONNECTED TO A TANK OF LIQUEFIED GAS AND EMPLOYING A RECIPROCATING PISTON MOUNTED ADJACENT A CYLINDRICAL WEAR SURFACE AND INCLUDING A PISTON RING CARRIED BY THE PISTON AND INTERPOSED BETWEEN THE PISTON AND THE WEAR SURFACE TO PREVENT THE FLOW OF LIQUEFIED GAS, SAID PISTON RING BEING FORMED OF A MATERIAL WHICH IS VERY HARD AND RESISTANT TO WEAR OF CRYOGENIC TEMPERATURES BUT WHICH EXHIBITS PLASTIC FLOW AT TEMPERATURES NEAR THE AMBIENT FOR THE PUMP, SAID METHOD COMPRISING THE STEPS OF OPERATING SAID
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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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |