Patent US2980056A successfully refreshed from Google Patents.
US2980056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument lighting device
Assignee: Individual
•
Filing: 1954-03-08
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Granted: 1961-04-18
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Expires: 1974-03-08
Abstract
No abstract record available.
Inventors
- 👤 John H Achilich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:03
CPC Classifications
G; G01; G01D; G01D13/00; G01D11/00; G01D11/28; G05; G05D; G05D11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172765A
Cited
FR817194A
Cited
US2328485A
Cited
US2287605A
Cited
US2401867A
Cited
DE827715C
Cited
US2681977A
Cited
US2768605A
Cited
US2715886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |