US3565661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor coverings and the like
Assignee: Welwyn Plastics 1955 Ltd
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Filing: 1968-06-14
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Granted: 1971-02-23
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Expires: 1988-06-14
Abstract
Abstract AN IMPROVED FLOOR COVERING AND A PROCESS FOR MAKING THE SAME. A BASE MATERIAL IN SHEET FORM HAVING A COATING OF A THERMOPLASTIC MATERIAL SUCH AS POLYVINYL CHLORIDE IMPREGNATED WITH AN ABRASIVE SUBSTANCE IN GRIT FORM. A SECOND COATING OF A THERMOPLASTIC MATERIAL IS PREFERABLY APPLIED OVER THE FIRST COATING ALSO CONTAINING AN ABRASIVE IN GRIT FORM TO WHICH SILICON CARBIDE IS SPRINKLED THEREOVER. THE TREAD SURFACE OF THE FLOOR COVERING IS EMBOSSED TO PROVIDE SMALL INDENTATIONS THEREIN.
Inventors
- 👤 Alan Morley Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:38
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0057; B29C; B29C43/00; B29C43/22; B29C43/222; D; D06; D06N; D06N7/00; D06N7/0005; D06N7/0007; D06N7/001; D06N7/0039; D06N7/0052; D06N7/0055; B29L; B29L2031/00; B29L2031/30; B29L2031/3005; B29L2031/3017; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/31504; Y10T428/31652; Y10T428/31667
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |