US2986636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear and logarithmic amplifiers for compensated ionization chambers
Assignee: Robertshaw Controls Co
•
Filing: 1957-08-15
•
Granted: 1961-05-30
•
Expires: 1977-08-15
Abstract
No abstract record available.
Inventors
- 👤 Robert L Carlson
- 👤 Cecil A Crafts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:00
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2496723A
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US2470224A
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US2480808A
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US2506435A
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US2728862A
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US2769098A
Cited
US2818504A
Cited
US2756345A
Cited
US2824971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |