Gamma radiation field intensity meter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 16, 1994
Grant Date -
N/A
app pub date -
Apr 9, 1993
filing date -
Apr 9, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A gamma radiation intensity meter measures dose rate of a radiation field. The gamma radiation intensity meter includes a tritium battery emitting beta rays generating a current which is essentially constant. Dose rate is correlated to an amount of movement of an electroscope element charged by the tritium battery. Ionizing radiation decreases the voltage at the element and causes movement. A bleed resistor is coupled between the electroscope support element or electrode and the ionization chamber wall electrode.
First Claim
all claims..Other Claims data not available
Family
- No Family data available.
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
MARTIN MARIETTA ENERGY SYSTEMS INC | 701 SCARBORO ROAD POST OFFICE BOX 2009 OAK RIDGE TN 37831 |
International Classification(s)

- 1993 Application Filing Year
- G01T Class
- 102 Applications Filed
- 56 Patents Issued To-Date
- 54.91 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Thacker, Louis H | Knoxville, TN | 6 | 24 |
# of filed Patents : 6 Total Citations : 24 |
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Patent Citation Ranking
- 1 Citation Count
- G01T Class
- 1.27 % this patent is cited more than
- 31 Age
Forward Cite Landscape
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
---|---|---|---|
Jan 27, 2018 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Dec 27, 1995 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Dec 27, 1995 |
Dec 24, 1995 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
Aug 01, 1995 | REMI | MAINTENANCE FEE REMINDER MAILED | |
Dec 24, 1991 | I | Issuance | |
Dec 03, 1991 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Sep 20, 1990 | F | Filing | |
Mar 17, 1989 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:YOUNGDALE, GILBERT A.;REEL/FRAME:005523/0088 Owner name: UPJOHN COMPANY, THE, KALAMAZOO, MI A CORP. OF DE Effective Date: Mar 17, 1989 |
Mar 31, 1988 | PD | Priority Date |

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