US3500121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic counting or timekeeping system using glow discharge tube without permanent anode
Assignee: General Time Corp
•
Filing: 1968-02-15
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Granted: 1970-03-10
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Expires: 1988-02-15
Abstract
No abstract record available.
Inventors
- 👤 Heinz A De Koster
- 👤 Michael J Ingenito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:39
CPC Classifications
H; H03; H03K; H03K29/00; G; G04; G04G; G04G9/00; G04G9/02; G04G9/04; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/492; H01J17/494; H01J17/495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2780747A
Cited
US2835848A
Cited
US2970226A
Cited
US2906906A
Cited
US3119950A
Cited
US3329863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |