US2850239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counting device
Assignee: American Optical Corp
•
Filing: 1952-08-16
•
Granted: 1958-09-02
•
Expires: 1972-08-16
Abstract
No abstract record available.
Inventors
- 👤 Michael L Polanyi
- 👤 Richard S Robins
- 👤 James E Johnston
- 👤 Morden G Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:19
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/14; G01N15/1468
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2393631A
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US2455639A
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US2536916A
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US2529666A
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US2494441A
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US2547623A
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US2584052A
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US2609144A
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US2590057A
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US2731202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |