US2836894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical tracking recording system
Assignee: H A WAGNER Co
•
Filing: 1954-04-19
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Granted: 1958-06-03
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Expires: 1974-04-19
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:34
CPC Classifications
G; G01; G01C; G01C1/00; G01C1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1315539A
Cited
GB371517A
Cited
US2071424A
Cited
US2099536A
Cited
US2414102A
Cited
US2414108A
Cited
US2550700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |