Patent US2887618A successfully refreshed from Google Patents.
US2887618A
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US
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Vacuum arrangement
Assignee: General Electric Co
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Filing: 1954-10-04
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Granted: 1959-05-19
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Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Reid Eugene Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:12
CPC Classifications
F; F04; F04F; F04F9/00; H; H01; H01J; H01J13/00; H01J13/02; H01J13/28; H01J2893/00; H01J2893/0072; H01J2893/0073; H01J2893/0074; H01J2893/0086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2063665A
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US2215906A
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US2333010A
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US2331896A
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US2374205A
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US2521308A
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US2543010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |