US3145629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic pump sealing rings
Assignee: Union Carbide Corp
•
Filing: 1960-12-13
•
Granted: 1964-08-25
•
Expires: 1980-12-13
Abstract
No abstract record available.
Inventors
- 👤 Christian F Gottzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:15
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/06; F04B15/08; F04B53/00; F04B53/14; F04B53/143; Y; Y10; Y10S; Y10S285/00; Y10S285/904; Y10S417/00; Y10S417/01; Y10S417/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A RECIPROCATING PLUNGER PUMP FOR CRYOGENIC LIQUIDS BOILING BELOW 273* K. PUMPED TO PRESSURES ABOVE 200 P.S.I., AND HAVING COLD AND WARM END PORTIONS, THE IMPROVEMENT COMPRISING A METAL PUMP BARREL HAVING AN INNER MATING SURFACE; A PUMP PLUNGER SLIDEABLY FITTING IN THE BARREL AND HAVING AN EXTERNAL ANNULAR GROOVE; A SELFLUBRICATING ANNULAR SEALING RING WITHIN THE ANNULAR GROOVE HAVING AN OUTER SURFACE WHICH ENGAGES THE BARREL MATING
Claim 2
Dependent Claim
69 words
IN A RECIPROCATING PLUNGER PUMP FOR CRYOGENIC LIQUIDS BOILING BELOW 273* K. PUMPED TO PRESSURES ABOVE 200 P.S.I., AND HAVING COLD AND WARM END PORTIONS, THE IMPROVEMENT COMPRISING A METAL PUMP BARREL HAVING AN INNER MATING SURFACE; A PUMP PLUNGER SLIDEABLY FITTING IN THE BARREL AND HAVING AN EXTERNAL ANNULAR GROOVE; A SELFLUBRICATING ANNULAR SEALING RING WITHIN THE ANNULAR GROOVE HAVING AN OUTER SURFACE WHICH ENGAGES THE BARREL MATING
References Cited (Backward Citations)
US2135076A
Cited
US2198301A
Cited
US2607644A
Cited
US2784013A
Cited
FR1102582A
Cited
US2846280A
Cited
US2857218A
Cited
US2831325A
Cited
US2855859A
Cited
US2931673A
Cited
US2991003A
Cited
US2973978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |