US2315280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum tube apparatus
Assignee: Machlett Laboratories Inc
•
Filing: 1939-03-10
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Granted: 1943-03-30
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Expires: 1959-03-10
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Skehan
- 👤 George J Agule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:15
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/02; F16C19/14; F16C19/16; F16C19/163; F16C33/00; F16C33/30; F16C33/66; F16C33/6696; H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/101; H01J35/1017; H01J35/1024; H01J2235/00; H01J2235/10; H01J2235/1046; H01J2235/1066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-03-29 | 1946-09-28 | 1947-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-29 | 1950-09-28 | 1951-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-29 | 1954-09-28 | 1955-03-30 | $7700.00 | Window Closed / Lapsed |