Patent US3228589A successfully refreshed from Google Patents.
US3228589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion pump having encapsulated internal magnet assemblies
Assignee: General Electric Co
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Filing: 1963-10-16
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Granted: 1966-01-11
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Expires: 1983-10-16
Abstract
No abstract record available.
Inventors
- 👤 William J Kearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:23
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/18; H01J41/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
AN IONIC VACUUM PUMP COMPRISING IN COMBINATION, (A) AN ENCLOSURE MEMBER ADAPTED TO BE SUBJECTED TO HIGH VACUUM CONDITIONS, (B) A ROW OF LATERALLY SPACED APART ANODE-CATHODE ASSEMBLIES IN SAID ENCLOSURE, (C) A ROW OF LATERALLY SPACED APART SEALED ENCAPSULATED MAGNETS IN SAID ENCLOSURE BETWEEN SAID ANODE-CATHODE STRUCTURES WITH ONE MAGNET BETWEEN EACH PAIR OF SAID ANODE-CATHODE ASSEMBLIES IN SAID ROW TO PROVIDE A MAGNETIC FIELD TO INCREASE IONIZATION, (D) MEANS RELEASABLY SECURING SAID MAGNETS IN A UNITARY RELATIONSHIP SO THAT THE INSERTION AND WITHDRAWAL OF SAID MAGNETS FROM SAID ENCLOSURE TAKES PLACE AS A SINGLE UNIT,
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |