Patents by Inventor William Campbell Crawford

William Campbell Crawford has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11525210
    Abstract: A knitted spacer fabric has a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibres extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibres that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: December 13, 2022
    Assignee: Concrete Canvas Technology Ltd.
    Inventors: William Campbell Crawford, Peter Eric Brewin
  • Publication number: 20210017702
    Abstract: A knitted spacer fabric has a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibres extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibres that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out.
    Type: Application
    Filed: July 8, 2020
    Publication date: January 21, 2021
    Applicant: Concrete Canvas Technology Ltd.
    Inventors: William Campbell Crawford, Peter Eric Brewin
  • Patent number: 10738417
    Abstract: A knitted spacer fabric has a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibres extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibres that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: August 11, 2020
    Assignee: Concrete Canvas Technology Ltd.
    Inventors: William Campbell Crawford, Peter Eric Brewin
  • Publication number: 20170022656
    Abstract: A knitted spacer fabric has a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibres extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibres that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out.
    Type: Application
    Filed: October 4, 2016
    Publication date: January 26, 2017
    Applicant: Concrete Canvas Technology Ltd.
    Inventors: William Campbell Crawford, Peter Eric Brewin
  • Patent number: 9486974
    Abstract: A knitted spacer fabric has a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibers extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibers that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: November 8, 2016
    Assignee: Concrete Canvas Technology Ltd.
    Inventors: William Campbell Crawford, Peter Eric Brewin
  • Publication number: 20140205776
    Abstract: A knitted spacer fabric has a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibres extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibres that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out.
    Type: Application
    Filed: March 20, 2014
    Publication date: July 24, 2014
    Applicant: CONCRETE CANVAS TECHNOLOGY LTD.
    Inventors: William Campbell Crawford, Peter Eric Brewin
  • Patent number: 8703266
    Abstract: A knitted spacer fabric has a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibers extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibers that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: April 22, 2014
    Assignee: Concrete Canvas Technology Ltd.
    Inventors: William Campbell Crawford, Peter Eric Brewin
  • Patent number: 8343609
    Abstract: A knitted spacer fabric having a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibres extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibres that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: January 1, 2013
    Assignee: Concrete Canvas Technology Ltd.
    Inventors: William Campbell Crawford, Peter Eric Brewin
  • Publication number: 20110311755
    Abstract: A knitted spacer fabric having a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibres extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibres that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out.
    Type: Application
    Filed: January 29, 2010
    Publication date: December 22, 2011
    Applicant: CONCRETE CANVAS TECHNOLOGY LTD.
    Inventors: William Campbell Crawford, Peter Eric Brewin