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US3632372A Expired / Lapsed US ⏱️ 0.0 years remaining

Plastic coating of plasterboards or wood

Assignee: Imperial Chemical Industries Ltd
•
Filing: 1965-03-19
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Granted: 1972-01-04
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Expires: 1985-03-19
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Abstract

Abstract Process for coating the surface of materials such as wood and plasterboard with a thermoplastic material, e.g. polypropylene, by spreading a layer of the thermoplastic material in powdered form over the surface to be coated, subjecting the spread surface to heating by infrared radiation until the thermoplastic material is softened and, before the thermoplastic material has had time to harden, applying pressure to the spread surface so as to cause fusion of the thermoplastic particles, and causing or allowing the resulting thermoplastic coating to set.

Inventors

  • 👤 John Richard William Heslop
  • 👤 Albert Edward Riley

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 09:37
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/40; B05D1/42; B05D2401/00; B05D2401/30; B05D2401/32; B05D3/00; B05D3/02; B05D3/0254; B05D3/0263; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31779; Y10T428/31783; Y10T428/31855; Y10T428/3188; Y10T428/31895

Claims Analysis

Total Claims: 0
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-01-03 1975-07-05 1976-01-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-01-03 1979-07-05 1980-01-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-01-03 1983-07-05 1984-01-04 $7700.00 Window Closed / Lapsed

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