Flat pipe
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 30, 1999
Grant Date -
N/A
app pub date -
Feb 17, 1997
filing date -
Feb 28, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A flat pipe includes a hollow body having a pair of upper and lower walls extending substantially parallel to each other, and opposite lateral sides joined thereto, and a plurality of spacers closely fit between the upper and lower walls of the body and interconnected by a permeable sheet. The spacers are arranged at equal intervals to define a plurality of parallel fluid passages. The spacers are fused to opposite sides of the sheet in alternating relationship so that the sheet is inclined between adjacent spacers. The spacers are resistant to compression and deformation.
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 | |
---|---|---|
TAKAHASHI KEI | Not Provided |
International Classification(s)

- 1997 Application Filing Year
- F15D Class
- 24 Applications Filed
- 10 Patents Issued To-Date
- 41.67 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Takahashi, Kei | 1-14-16 Achi, Kurashiki, Okayama 710, JP | 407 | 3896 |
# of filed Patents : 407 Total Citations : 3896 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 11 Citation Count
- F15D Class
- 50 % this patent is cited more than
- 26 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 |
---|---|---|---|
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
- (1) the ratio (WA2/DA2) of the yarn length of the multifilament fiber A2 during absorption of moisture and humidity (WA2) to the yarn length of the multifilament yarn A2 under conditions of 20° C. and 65% humidity (DA2) is 1.02 to 1.30;(2) the ratio (WA2/DB2) of the yarn length of the multifilament yarn A2 during absorption of moisture and humidity (WA2) to the yarn length of the multifilament yarn B2 under conditions of 20° C. and 65% humidity (DB2) is 0.9 to 1.1; and(3) the drying shrinkage stress (DS value) of the multifilament yarn A2 is 0.08 cN/dtex or more.

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Mar 03, 2025 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MITSUBISHI CHEMICAL CORPORATION;REEL/FRAME:070526/0880 Owner name: SOALON CORPORATION, JAPAN Effective Date: Mar 03, 2025 |
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Nov 07, 2017 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551) year of fee payment: 4 |
Apr 01, 2017 | AS | ASSIGNMENT | free format text: CHANGE OF NAME;ASSIGNOR:MITSUBISHI RAYON CO., LTD.;REEL/FRAME:043750/0834 Owner name: MITSUBISHI CHEMICAL CORPORATION, JAPAN Effective Date: Apr 01, 2017 |
Apr 01, 2016 | AS | ASSIGNMENT | free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE RECEIVING PARTY ADDRESS PREVIOUSLY RECORDED ON REEL 043479 FRAME 0173. ASSIGNOR(S) HEREBY CONFIRMS THE ADDRESS SHOULD INCLUDE TOKYO THAT WAS MISSING;ASSIGNOR:MITSUBISHI RAYON TEXTILE CO LTD;REEL/FRAME:044059/0001 Owner name: MITSUBISHI RAYON CO., LTD., JAPAN Effective Date: Apr 01, 2016 |
Apr 01, 2016 | AS | ASSIGNMENT | free format text: MERGER;ASSIGNOR:MITSUBISHI RAYON TEXTILE CO LTD;REEL/FRAME:043479/0173 Owner name: MITSUBISHI RAYON CO., LTD., JAPAN Effective Date: Apr 01, 2016 |
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May 13, 2014 | I | Issuance | |
Apr 23, 2014 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Jan 29, 2009 | P | Published | |
Dec 27, 2007 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KANATANI, SHOJI;REEL/FRAME:020310/0389 Owner name: MITSUBISHI RAYON CO., LTD., JAPAN Effective Date: Dec 27, 2007 free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KANATANI, SHOJI;REEL/FRAME:020310/0389 Owner name: MITSUBISHI RAYON TEXTILE CO., LTD., JAPAN Effective Date: Dec 27, 2007 |
Jun 30, 2006 | F | Filing | |
Jul 05, 2005 | PD | Priority Date |

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