Pressure-resistant sheath of a submarine optical fibre cable and method for the production thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 19, 1989
Grant Date -
N/A
app pub date -
Jan 7, 1987
filing date -
Jun 14, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Cross-sectionally fan-shaped metal segments 10a, 10b and 10c, shown in FIG. 1, are longitudinally assembled along an optical fibre to form a pressure-resistant sheath 10 for protecting an optical fibre unit for use in a transmission medium of a submarine optical fibre cable. The inner surfaces 11a, 11b, and 11c, shown in FIG. 1, of the metal segments 10a, 10b and 10c as well as all the contact faces 12a, 12b, and 12c also shown in FIG. 1 are so roughened that the adhesion force associated with the optical fibre unit 1 and the pressure-resistant sheath 10 and the metal segments themselves 10a, 10b and 10c can be strengthened enough to protect the optical fibre unit. Water penetration which may occur in case of cable damages can also be prevented.
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 | |
---|---|---|
NANIWA SEITEI CO LTD | 1-1 UCHIANDOJIMACHIDORI 1-CHOME HIGASHI-KU OSAKA-SHI OSAKA-FU 540 | |
OCEAN CABLE CO LTD | SIBUYA-KU TOKYO 150 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Funaki, Kiyoshi | Tokyo, JP | 3 | 17 |
# of filed Patents : 3 Total Citations : 17 | |||
Ikeda, Jiro | Tokyo, JP | 24 | 601 |
# of filed Patents : 24 Total Citations : 601 | |||
Mochizuki, Kenichi | Tokyo, JP | 21 | 109 |
# of filed Patents : 21 Total Citations : 109 | |||
Murao, Kazuhiko | Higashiosaka, JP | 3 | 20 |
# of filed Patents : 3 Total Citations : 20 | |||
Murao, Masatsugu | Higashiosaka, JP | 5 | 24 |
# of filed Patents : 5 Total Citations : 24 | |||
Murao, Mitsuaki | Higashiosaka, JP | 1 | 1 |
# of filed Patents : 1 Total Citations : 1 | |||
Murao, Yoshinori | Higashiosaka, JP | 2 | 5 |
# of filed Patents : 2 Total Citations : 5 |
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Patent Citation Ranking
- 1 Citation Count
- G02B Class
- 0 % this patent is cited more than
- 36 Age
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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 |
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Nov 30, 2005 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Nov 02, 2005 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Nov 02, 2005 |
Nov 02, 2005 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
May 18, 2005 | REMI | MAINTENANCE FEE REMINDER MAILED | |
Apr 26, 2001 | FPAY | FEE PAYMENT | year of fee payment: 8 |
Dec 04, 2000 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Apr 23, 1997 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Apr 12, 1994 | CC | CERTIFICATE OF CORRECTION | |
Nov 02, 1993 | I | Issuance | |
Feb 11, 1991 | F | Filing | |
Jun 08, 1984 | PD | Priority Date |

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