Miniaturized microwave cavity for atomic frequency standard
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 1, 2001
Grant Date -
N/A
app pub date -
Oct 25, 1999
filing date -
Oct 27, 1998
priority date (Note) -
In Force
status (Latency Note)
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Importance

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Abstract
The present invention relates to a kind of microwave cavity for atomic frequency standard, which consists of slotted tube, cylindrical cavity body, dielectric ring, heating filament, screw bolt for adjustment of cavity frequency. Its characteristics are listed as follows: 1. There are slots and electrodes at the upside of slotted tube. 2. The slotted tube and the bottom cap of the cavity are made as a whole. 3. The Rb absorption cell is inserted in the slotted tube. 4. The dielectric ring is inserted between the slotted tube and the cylindrical cavity body. 5. There is one or more screw hole in the wall of cylindrical cavity body. 6. One or more screw bolt for adjustment of cavity frequency is installed into the screw hole.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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WUHAN INSTITUTE OF PHYSICS AND | PO BOX 71010 MATHEMATICS THE CHINESE ACADEMY OF SCIENCES WUHAN 430071 HUBEI |
International Classification(s)

- 1999 Application Filing Year
- H03B Class
- 312 Applications Filed
- 207 Patents Issued To-Date
- 66.35 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
An, Shaofeng | Wuhan, CN | 4 | 4 |
# of filed Patents : 4 Total Citations : 4 | |||
Huang, Xueren | Wuhan, CN | 1 | 4 |
# of filed Patents : 1 Total Citations : 4 | |||
Liu, Jinting | Wuhan, CN | 2 | 4 |
# of filed Patents : 2 Total Citations : 4 | |||
Mei, Ganghua | Wuhan, CN | 1 | 4 |
# of filed Patents : 1 Total Citations : 4 | |||
Zhong, Da | Wuhan, CN | 3 | 5 |
# of filed Patents : 3 Total Citations : 5 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 4 Citation Count
- H03B Class
- 0.96 % this patent is cited more than
- 24 Age
Forward Cite Landscape
- No Forward Cites to Display

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 26, 2018 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
May 10, 1998 | FP | EXPIRED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: May 10, 1998 |
May 10, 1998 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
May 10, 1994 | I | Issuance | |
Nov 02, 1992 | F | Filing | |
Apr 04, 1989 | PD | Priority Date |

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