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Patent US3109168A successfully refreshed from Google Patents.
US3109168A
Expired / Lapsed
US
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Changeable indicators for display devices
Assignee: SPX Technologies Inc
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Filing: 1959-07-01
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Granted: 1963-10-29
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Expires: 1979-07-01
Abstract
No abstract record available.
Inventors
- 👤 Karl W Abendroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:53
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/375; G08; G08B; G08B5/00; G08B5/22; G08B5/24; G08B5/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US809796A
Cited
GB398893A
Cited
US2513375A
Cited
US2644939A
Cited
US2585974A
Cited
US2740955A
Cited
GB716167A
Cited
GB740780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |