US3343780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum pump apparatus
Assignee: Varian Medical Systems Inc
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Filing: 1965-03-05
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Granted: 1967-09-26
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Expires: 1985-03-05
Abstract
No abstract record available.
Inventors
- 👤 Wesley H Hayward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:55
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/14; H01J41/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A VACUUM PUMP APPARATUS COMPRISING: (A) AN EVACUABLE ENVELOPE ADAPTED TO CONTAIN GAS MOLECULES; (B) ELECTRON EMISSIVE SUBLIMATION MEANS DISPOSED WITHIN SAID ENVELOPE AND INCLUDING A SOURCE OF GETTER MATERIAL, SAID MEANS ADAPTED TO BE HEATED SO AS TO CAUSE ELECTRON EMISSION AND SUBLIMATION OF GETTER MATERIAL THEREFROM; (C) A SURFACE DISPOSED WITHIN SAID ENVELOPE FOR RECEIVING GETTER MATERIAL AND COLLECTING POSITIVE IONS; AND
Claim 2
Dependent Claim
64 words
A VACUUM PUMP APPARATUS COMPRISING: (A) AN EVACUABLE ENVELOPE ADAPTED TO CONTAIN GAS MOLECULES; (B) ELECTRON EMISSIVE SUBLIMATION MEANS DISPOSED WITHIN SAID ENVELOPE AND INCLUDING A SOURCE OF GETTER MATERIAL, SAID MEANS ADAPTED TO BE HEATED SO AS TO CAUSE ELECTRON EMISSION AND SUBLIMATION OF GETTER MATERIAL THEREFROM; (C) A SURFACE DISPOSED WITHIN SAID ENVELOPE FOR RECEIVING GETTER MATERIAL AND COLLECTING POSITIVE IONS; 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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |