US2428587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-electric device
Assignee: Westinghouse Electric Corp
•
Filing: 1943-07-20
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Granted: 1947-10-07
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Expires: 1963-07-20
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:39
CPC Classifications
H; H01; H01J; H01J13/00; H01J13/02; H01J13/04; H01J13/06; H01J13/14; H01J2893/00; H01J2893/0072; H01J2893/0073; H01J2893/0074; H01J2893/0075; H01J2893/0081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1188773A
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US1118380A
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US1201271A
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US2069283A
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US2015537A
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US2045659A
Cited
US2254722A
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US2256757A
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US2342412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |