US2685503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterless piston-type gasholder
Assignee: MAN AG
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Filing: 1952-06-03
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Granted: 1954-08-03
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Expires: 1972-06-03
Abstract
No abstract record available.
Inventors
- 👤 Knecht Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:20
CPC Classifications
F; F17; F17B; F17B1/00; F17B1/02; F17B1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A WATERLESS PISTON-TYPE GAS HOLDER HAVING SIDE WALLS, A ROOF VERTICALLY MOVABLE WITHIN SAID WALLS, AND SEALING MEANS BETWEEN THE OUTER PERIPHERY OF SAID ROOF AND THE INNER SURFACE OF SAID WALLS, SAID MEANS COMPRISING A SEALING STRIP SLIDABLY ENGAGING SAID INNER WALL SURFACE, MEANS EXTENDING BETWEEN SAID ROOF AND SAID STRIP FOR RESILIENTLY PRESSING SAID STRIP AGAINST SAID SURFACE, A FILLING OF A LIQUID LIGHTER THAN WATER COVERING SAID STRIP AND SAID RESILIENT PRESSING MEANS, AND MEANS FOR GUIDING WATER SETTLING THROUGH SAID LIQUID TO SAID STRIP FOR LEAKAGE BETWEEN SAID STRIP AND SAID SURFACE.
Claim 2
Dependent Claim
97 words
IN A WATERLESS PISTON-TYPE GAS HOLDER HAVING SIDE WALLS, A ROOF VERTICALLY MOVABLE WITHIN SAID WALLS, AND SEALING MEANS BETWEEN THE OUTER PERIPHERY OF SAID ROOF AND THE INNER SURFACE OF SAID WALLS, SAID MEANS COMPRISING A SEALING STRIP SLIDABLY ENGAGING SAID INNER WALL SURFACE, MEANS EXTENDING BETWEEN SAID ROOF AND SAID STRIP FOR RESILIENTLY PRESSING SAID STRIP AGAINST SAID SURFACE, A FILLING OF A LIQUID LIGHTER THAN WATER COVERING SAID STRIP AND SAID RESILIENT PRESSING MEANS, AND MEANS FOR GUIDING WATER SETTLING THROUGH SAID LIQUID TO SAID STRIP FOR LEAKAGE BETWEEN SAID STRIP AND SAID SURFACE.
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) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |