US2919403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency measuring and display system
Assignee: Vitro Corp of America
•
Filing: 1954-06-15
•
Granted: 1959-12-29
•
Expires: 1974-06-15
Abstract
No abstract record available.
Inventors
- 👤 Rudolph W Buntenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:59
CPC Classifications
G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2607528A
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US2532435A
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US2566222A
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US2558100A
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GB706298A
Cited
US2778972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |