Patent US2748291A successfully refreshed from Google Patents.
US2748291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable dosimeter for radio-active radiation
Assignee: Hartford National Bank and Trust Co
•
Filing: 1952-08-12
•
Granted: 1956-05-29
•
Expires: 1972-08-12
Abstract
No abstract record available.
Inventors
- 👤 Warmoltz Nicolaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:03
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/02; H01J47/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PORTABLE DOSIMETER FOR MEASURING RADIO-ACTIVE RADIATION COMPRISING A SEALED ENVELOPE, AN IONIZABLE MEDIUM IN SAID ENVELOPE, A FIRST PAIR OF ELECTRODES DISPOSED WITHIN SAID ENVELOPE INCLUDING A HIGH-VOLTAGE ELECTRODE WHICH IS WHOLLY WITHIN THE ENVELOPE AND FREE OF ANY EXTERNAL CONDUCTIVE CONNECTIONS, AN ELECTROMETER DISPOSED WITHIN SAID ENVELOPE AND CONNECTED TO SAID HIGHVOLTAGE ELECTRODE, A SECOND PAIR OF ELECTRODES DISPOSED IN SAID ENVELOPE AND SPACED FROM SAID HIGH-VOLTAGE ELECTRODE, AND MEANS FOR APPLYING A HIGH VOLTAGE BETWEEN SAID SECOND PAIR OF ELECTRODES TO PRODUCE A DISCHARGE THEREBETWEEN AND THEREBY CHARGE UP THE HIGH-VOLTAGE ELECTRODE.
Claim 2
Dependent Claim
95 words
A PORTABLE DOSIMETER FOR MEASURING RADIO-ACTIVE RADIATION COMPRISING A SEALED ENVELOPE, AN IONIZABLE MEDIUM IN SAID ENVELOPE, A FIRST PAIR OF ELECTRODES DISPOSED WITHIN SAID ENVELOPE INCLUDING A HIGH-VOLTAGE ELECTRODE WHICH IS WHOLLY WITHIN THE ENVELOPE AND FREE OF ANY EXTERNAL CONDUCTIVE CONNECTIONS, AN ELECTROMETER DISPOSED WITHIN SAID ENVELOPE AND CONNECTED TO SAID HIGHVOLTAGE ELECTRODE, A SECOND PAIR OF ELECTRODES DISPOSED IN SAID ENVELOPE AND SPACED FROM SAID HIGH-VOLTAGE ELECTRODE, AND MEANS FOR APPLYING A HIGH VOLTAGE BETWEEN SAID SECOND PAIR OF ELECTRODES TO PRODUCE A DISCHARGE THEREBETWEEN AND THEREBY CHARGE UP THE HIGH-VOLTAGE ELECTRODE.
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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |