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Patent US2947168A successfully refreshed from Google Patents.
US2947168A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1954-06-23
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Granted: 1960-08-02
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Expires: 1974-06-23
Abstract
No abstract record available.
Inventors
- 👤 Denis C Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:33
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/24; G01L3/242; G01L3/02; G01L3/04; G01L3/10; G01L3/101; G01L3/104; G01L3/109; G01L3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675700A
Cited
US2277285A
Cited
US2193079A
Cited
GB600980A
Cited
US2586540A
Cited
US2640352A
Cited
US2782626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |