Patent US3216652A successfully refreshed from Google Patents.
US3216652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionic vacuum pump
Assignee: Raytheon Co
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Filing: 1962-09-10
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Granted: 1965-11-09
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Knauer Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:21
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/18; H01J41/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
AN IONIC PUMP COMPRISING A FIRST CHAMBER BEING ADAPTED TO BE CONNECTED TO APPARATUS TO BE EVACUATED, AND A SECOND CHAMBER EXTENDING INTO SAID FIRST CHAMBER, AN ANODE MEMBER WITHIN SAID FIRST CHAMBER, A REACTIVE CATHODE MEMBER WITHIN SAID FIRST CHAMBER, AND MAGNETIC
Claim 2
Dependent Claim
43 words
AN IONIC PUMP COMPRISING A FIRST CHAMBER BEING ADAPTED TO BE CONNECTED TO APPARATUS TO BE EVACUATED, AND A SECOND CHAMBER EXTENDING INTO SAID FIRST CHAMBER, AN ANODE MEMBER WITHIN SAID FIRST CHAMBER, A REACTIVE CATHODE MEMBER WITHIN SAID FIRST CHAMBER, AND MAGNETIC
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |