US3084848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved vacuum pumps
Assignee: Varian Medical Systems Inc
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Filing: 1960-10-03
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Granted: 1963-04-09
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Expires: 1980-10-03
Abstract
No abstract record available.
Inventors
- 👤 William A Lloyd
- 👤 Zaphiropoulos Renn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:51
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/18; H01J41/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A GETTER ION VACUUM PUMP APPARATUS INCLUDING AN ENVELOPE DEFINING A CENTRAL HOLLOW CHAMBER COMMUNICATING WITH THE STRUCTURE IT IS DESIRED TO EVACUATE, A PLURALITY OF LESSER ENVELOPES DEFINING A PLURALITY OF LESSER CHAMBERS COMMUNICATING WITH SAID CENTRAL CHAMBER, ANODE AND CATHODE MEMBERS DISPOSED WITHIN SAID LESSER CHAMBERS, MEANS FOR SUPPLYING A POTENTIAL DIFFERENCE BETWEEN SAID ANODE AND CATHODE MEMBERS OF SUFFICIENT MAGNITUDE TO PRODUCE A GLOW DISCHARGE THEREBETWEEN FOR PUMPING GASEOUS MATTER WITHIN SAID ENVELOPE AND SAID LESSER CHAMBERS, MEANS FOR PRODUCING AND DIRECTING A MAGNETIC FIELD DIRECTED SUBSTANTIALLY AT RIGHT ANGLES TO SAID ANODE AND CATHODE MEMBERS FOR ENHANCING GLOW DISCHARGE, A VOLTAGE FEED-THROUGH MEANS FOR FEEDING THE POTENTIAL DIFFERENCE TO SAID ANODE AND CATHODE MEMBERS, AND A RECESSED FEED-THROUGH HOUSING MEANS FOR SUPPORTING SAID FEED-THROUGH MEANS ENTIRELY WITHIN SAID ENVELOPE IN A VACUUM TIGHT MANNER.
Claim 2
Dependent Claim
138 words
A GETTER ION VACUUM PUMP APPARATUS INCLUDING AN ENVELOPE DEFINING A CENTRAL HOLLOW CHAMBER COMMUNICATING WITH THE STRUCTURE IT IS DESIRED TO EVACUATE, A PLURALITY OF LESSER ENVELOPES DEFINING A PLURALITY OF LESSER CHAMBERS COMMUNICATING WITH SAID CENTRAL CHAMBER, ANODE AND CATHODE MEMBERS DISPOSED WITHIN SAID LESSER CHAMBERS, MEANS FOR SUPPLYING A POTENTIAL DIFFERENCE BETWEEN SAID ANODE AND CATHODE MEMBERS OF SUFFICIENT MAGNITUDE TO PRODUCE A GLOW DISCHARGE THEREBETWEEN FOR PUMPING GASEOUS MATTER WITHIN SAID ENVELOPE AND SAID LESSER CHAMBERS, MEANS FOR PRODUCING AND DIRECTING A MAGNETIC FIELD DIRECTED SUBSTANTIALLY AT RIGHT ANGLES TO SAID ANODE AND CATHODE MEMBERS FOR ENHANCING GLOW DISCHARGE, A VOLTAGE FEED-THROUGH MEANS FOR FEEDING THE POTENTIAL DIFFERENCE TO SAID ANODE AND CATHODE MEMBERS, AND A RECESSED FEED-THROUGH HOUSING MEANS FOR SUPPORTING SAID FEED-THROUGH MEANS ENTIRELY WITHIN SAID ENVELOPE IN A VACUUM TIGHT MANNER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-08 | 1966-10-08 | 1967-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-08 | 1970-10-08 | 1971-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-08 | 1974-10-08 | 1975-04-09 | $7700.00 | Window Closed / Lapsed |