US2728840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Specimen heating means
Assignee: General Electric Co
•
Filing: 1952-03-22
•
Granted: 1955-12-27
•
Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
- 👤 Maynard J Columbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:54
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1144942A
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US1686051A
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US2234578A
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US2440472A
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US2417213A
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US2514382A
Cited
US2554902A
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US2651236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |