US2807798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency indicator
Assignee: Individual
•
Filing: 1945-12-18
•
Granted: 1957-09-24
•
Expires: 1965-12-18
Abstract
No abstract record available.
Inventors
- 👤 Frank G Dunnington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:23
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/75; G01S13/751; G01S13/756; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/292; G01S7/41; G01S7/415
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1954996A
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US2007772A
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US1981884A
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US2005011A
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US2159790A
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US2581847A
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US2407287A
Cited
US2408048A
Cited
US2491542A
Cited
US2450946A
Cited
US2535274A
Cited
US2462102A
Cited
US2472782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |