Patent US3028444A successfully refreshed from Google Patents.
US3028444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescoping vacuum tube shield
Assignee: Staver Co Inc
•
Filing: 1956-07-10
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Granted: 1962-04-03
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Expires: 1976-07-10
Abstract
No abstract record available.
Inventors
- 👤 Edward F Staver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:52
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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US1447949A
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US1809355A
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US1827396A
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GB352733A
Cited
US2118665A
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GB597101A
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US2586946A
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US2961477A
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US2911458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |