Patent US3994367A successfully refreshed from Google Patents.
Patent US2709754A successfully refreshed from Google Patents.
US2709754A
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Method and apparatus for indicating radioactivity percentage ratios
Assignee: Nuclear Instrument and Chemical Corp
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Filing: 1954-04-14
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Granted: 1955-05-31
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Expires: 1974-04-14
Abstract
No abstract record available.
Inventors
- 👤 William C Davidon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:59
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/17; G01T1/178
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
APPARATUS FOR INDICATING THE RATIO OF THE RADIOACTIVITY OF AN UNKNOWN SPECIMEN TO THAT OF A STANDARD SPECIMEN COMPRISING MEANS INCLUDING A RADIATION DETECTOR AND SCALER FOR PRODUCING ELECTRICAL PULSES PROPORTIONAL IN RATE OF OCCURRENCE TO RADIOACTIVITY, A FIRST INACTIVATING MEANS COUPLED TO THE PULSE-PRODUCING MEANS FOR INACTIVATING THE PULSE-PRODUCING MEANS UPON RECEIPT THEREFROM OF 10N PULSES, WHERE N IS AN INTEGER GREATER THAN UNITY, A SECOND INACTIVATING MEANS COUPLED TO THE PULSE-PRODUCING MEANS FOR INACTIVATING THE PULSE-PRODUCING MEANS ON THE EXPIRATION OF A PRESETTABLE TIME INTERVAL, A COUPLING BETWEEN THE FIRST AND SECOND INACTIVATING MEANS CONSTRUCTED AND ARRANGED FOR PRESETTING THE PRESETTABLE TIME INTERVAL OF THE SECOND INACTIVATING MEANS, AND MANUALLY OPERABLE
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) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |