Patent US2967946A successfully refreshed from Google Patents.
US2967946A
Expired / Lapsed
US
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Light transmissivity control instrument
Assignee: Standard Oil Co
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Filing: 1957-10-31
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Granted: 1961-01-10
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Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 Frank A Leisey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:26
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/27; G01J; G01J1/00; G01J1/10; G01J1/16; G01J1/1626; G01J3/00; G01J3/46; G01J3/50; G01J3/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |