Patent US2907886A successfully refreshed from Google Patents.
US2907886A
Expired / Lapsed
US
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Radiation responsive devices
Assignee: International Business Machines Corp
•
Filing: 1955-12-05
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Granted: 1959-10-06
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Expires: 1975-12-05
Abstract
No abstract record available.
Inventors
- 👤 Dennis D Willard
- 👤 Gustav V A Malmros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:47
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J47/00; H01J47/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1724298A
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US1936514A
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US1907124A
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US2120765A
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US2480113A
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US2495697A
Cited
US2721950A
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US2773992A
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US2728835A
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US2777040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |