Encasing tubing having continuous bonding enhancing properties
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 13, 1991
Grant Date -
N/A
app pub date -
Mar 7, 1989
filing date -
Mar 8, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The wall (5) of the encasing tube (1) includes spiralling protrusions (3, 4). First protrusions (3) and second protrusions (4) run either in different directions or in the same direction but at different pitches. The encasing tube is used for enclosing tensioning cable (2) in concrete structures. By means of the particular arrangement of the protrusions, the flow properties of the grout are improved, air bubbles are virtually eliminated during injection, and the bonding properties of tensioning cables are improved by means of large bonding zones while respecting the required high fatigue strength.
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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VSL INTERNATIONAL AG | 3014 BERN |
International Classification(s)

- 1989 Application Filing Year
- F16L Class
- 661 Applications Filed
- 7 Patents Issued To-Date
- 1.06 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Siegfried, Erwin | Liebefeld, CH | 5 | 65 |
# of filed Patents : 5 Total Citations : 65 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 21 Citation Count
- F16L Class
- 0 % this patent is cited more than
- 34 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

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May 24, 2022 | CC | CERTIFICATE OF CORRECTION | |
Aug 31, 2021 | I | Issuance | |
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Sep 06, 2018 | F | Filing | |
Sep 06, 2018 | FEPP | FEE PAYMENT PROCEDURE | free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Mar 25, 2015 | AS | ASSIGNMENT | free format text: CHANGE OF NAME;ASSIGNOR:THINKWARE SYSTEMS CORPORATION;REEL/FRAME:047205/0008 Owner name: THINKWARE CORPORATION, KOREA, REPUBLIC OF Effective Date: Mar 25, 2015 |
Oct 16, 2013 | PD | Priority Date |

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