Patent US3283479A successfully refreshed from Google Patents.
US3283479A
Expired / Lapsed
US
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Combination trap pump
Assignee: Individual
•
Filing: 1964-07-09
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Granted: 1966-11-08
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Expires: 1984-07-09
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Batzer
- 👤 Robert H Mcfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:47
CPC Classifications
F; F04; F04B; F04B37/00; F04B37/06; F04B37/08; H; H01; H01J; H01J9/00; H01J9/38; H01J9/385
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A COMBINATION TRAP-PUMP FOR PRODUCING VACUUMS COMPRISING; (A) A GAS TIGHT OUTER CASING HAVING INLET AND OUTLET MEANS SPATIALLY INTERCOMMUNICATED BY THE VOLUME WITHIN SAID CASING FOR PASSAGE OF GAS THEREBETWEEN, (B) MEANS PROVIDING A LARGE GAS SORPTIVE CAPACITY DIPOSED IN SAID VOLUME FOR CONTACTING GAS PASSING THERETHROUGH, AND
Claim 2
Dependent Claim
49 words
A COMBINATION TRAP-PUMP FOR PRODUCING VACUUMS COMPRISING; (A) A GAS TIGHT OUTER CASING HAVING INLET AND OUTLET MEANS SPATIALLY INTERCOMMUNICATED BY THE VOLUME WITHIN SAID CASING FOR PASSAGE OF GAS THEREBETWEEN, (B) MEANS PROVIDING A LARGE GAS SORPTIVE CAPACITY DIPOSED IN SAID VOLUME FOR CONTACTING GAS PASSING THERETHROUGH, AND
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |