Patent US2283391A successfully refreshed from Google Patents.
Patent US3025489A successfully refreshed from Google Patents.
US3025489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube mounting device
Assignee: Birtcher Corp
•
Filing: 1957-08-14
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Granted: 1962-03-13
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Expires: 1977-08-14
Abstract
No abstract record available.
Inventors
- 👤 William S August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:34
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/02; H01J5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB240918A
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US1739748A
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US2438371A
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US2461658A
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US2536652A
Cited
US2787735A
Cited
US2808576A
Cited
US2766020A
Cited
US2882510A
Cited
US2852594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |