US3560601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing porous thermoplastic sheet material
Assignee: Ford Motor Co
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Filing: 1968-11-25
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Granted: 1971-02-02
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Expires: 1988-11-25
Abstract
Abstract FABRIC BACKED POLYVINYL CHLORIDE SHEET MATERIAL IS PASSED OVER AN EMBOSSING ROLL CONTAINING THE DESIRED SURFACE PATTERN AND A PLURALITY OF SMALL STUDS THAT PRODUCE DEPRESSIONS EXTENDING THROUGH ABOUT 80-95% OF THE POLYVINYL CHLORIDE FILM THICKNESS. HEATED AIR THEN IS DIRECTED AGAINST THE SHEET MATERIAL. THE HEAT AND PRESSURE OF THE AIR COMBINE TO REMOVE THE THIN SECTIONS REMAINING AT THE BOTTOMS OF THE DEPRESSIONS AND SMOOTH THE EDGES OF THE RESULTING PERFORATIONS.
Inventors
- 👤 Harry T Johnson
- 👤 Philip L Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:08
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/26; D; D06; D06N; D06N3/00; D06N3/0043; D06N3/0054; D06N3/007; D06N3/0077; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023; Y10T156/1039; Y10T156/1041
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |