Patent US2928249A successfully refreshed from Google Patents.
US2928249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized storage container and method of operating same
Assignee: Phillips Petroleum Co
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Filing: 1954-04-14
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Granted: 1960-03-15
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Expires: 1974-04-14
Abstract
No abstract record available.
Inventors
- 👤 Elburt S Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:54
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/005; E21B41/0057; E21B41/0064; B; B65; B65G; B65G5/00; Y; Y02; Y02C; Y02C20/00; Y02C20/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A METHOD FOR SEALING A CONTAINER WHICH CONTAINS A STORED LIQUID UNDER PRESSURE SO THAT A PUMP CAN BE WITHDRAWN FROM OR INSERTED INTO SAID CONTAINER WITHOUT LOSS OF PRESSURE THEREFROM, SAID LIQUID EXERTING A VAPOR PRESSURE, SAID CONTAINER BEING PROVIDED WITH A CLOSABLE CONDUIT EXTENDING DOWNWARDLY THROUGH A BOUNDARY OF SAID CONTAINER TO A LOWER REGION THEREOF, WHICH COMPRISES, PARTIALLY FILLING SAID CONDUIT WITH AN INERT FLUID WHICH IS IMMISCIBLE WITH AND OF GREATER DENSITY THEN SAID STORED LIQUID, SAID FLUID ATTAINING A LEVEL IN SAID CONTAINER OUTSIDE SAID CONDUIT SO THAT SAID CONTAINER IS THEREBY SEALED BY SAID INERT FLUID, STORED LIQUID THEREBY BEING ENTRAPPED IN SAID CONDUIT ABOVE SAID INERT FLUID, VENTING SAID ENTRAPPED STORED LIQUID FROM SAID CONDUIT AND CONCOMITANTLY THEREWITH INTRODUCING MORE OF SAID INERT FLUID TO SAID CONDUIT UNTIL THE PRESSURE OF THE HYDROSTATIC HEAD OF SAID INERT FLUID IN SAID CONDUIT ABOVE THE UPPER LEVEL OF SAID FLUID OUTSIDE SIDE CONDUIT PLUS ATMOSPHERIC PRESSURE EQUALS THE PRESSURE EXERTED BY THE ABSOLUTE VAPOR PRESSURE OF THE
Claim 2
Independent Claim
172 words
A METHOD FOR SEALING A CONTAINER WHICH CONTAINS A STORED LIQUID UNDER PRESSURE SO THAT A PUMP CAN BE WITHDRAWN FROM OR INSERTED INTO SAID CONTAINER WITHOUT LOSS OF PRESSURE THEREFROM, SAID LIQUID EXERTING A VAPOR PRESSURE, SAID CONTAINER BEING PROVIDED WITH A CLOSABLE CONDUIT EXTENDING DOWNWARDLY THROUGH A BOUNDARY OF SAID CONTAINER TO A LOWER REGION THEREOF, WHICH COMPRISES, PARTIALLY FILLING SAID CONDUIT WITH AN INERT FLUID WHICH IS IMMISCIBLE WITH AND OF GREATER DENSITY THEN SAID STORED LIQUID, SAID FLUID ATTAINING A LEVEL IN SAID CONTAINER OUTSIDE SAID CONDUIT SO THAT SAID CONTAINER IS THEREBY SEALED BY SAID INERT FLUID, STORED LIQUID THEREBY BEING ENTRAPPED IN SAID CONDUIT ABOVE SAID INERT FLUID, VENTING SAID ENTRAPPED STORED LIQUID FROM SAID CONDUIT AND CONCOMITANTLY THEREWITH INTRODUCING MORE OF SAID INERT FLUID TO SAID CONDUIT UNTIL THE PRESSURE OF THE HYDROSTATIC HEAD OF SAID INERT FLUID IN SAID CONDUIT ABOVE THE UPPER LEVEL OF SAID FLUID OUTSIDE SIDE CONDUIT PLUS ATMOSPHERIC PRESSURE EQUALS THE PRESSURE EXERTED BY THE ABSOLUTE VAPOR PRESSURE OF THE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |