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Patent US3303420A successfully refreshed from Google Patents.
US3303420A
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US
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Assignee: Individual
•
Filing: 1947-12-09
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Granted: 1967-02-07
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Expires: 1967-12-09
Abstract
No abstract record available.
Inventors
- 👤 Harris Frederick
- 👤 Mack J Sheets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:45
CPC Classifications
G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2130485A
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US2189300A
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US2434914A
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US2366628A
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US2434945A
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US2457136A
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US2470731A
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US2541067A
Cited
US2528187A
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US2481247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |