Patent US2659879A successfully refreshed from Google Patents.
Patent US3636147A successfully refreshed from Google Patents.
US3636147A
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US
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Method for making sheet material for visual pattern effects
Assignee: Rowland Products Inc
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Filing: 1969-01-14
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Granted: 1972-01-18
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Expires: 1989-01-14
Abstract
Abstract A process for making sheet material providing visual pattern effects utilizes two embossing rolls each having a multiplicity of closely spaced cavities therein to provide embossments on both surfaces of heated synthetic plastic sheet material passing therebetween. The speed of one or both rolls is varied so as to vary the period for the embossments of one surface to phase in and out of axial alignment with the embossments of the other surface, thereby providing varying visual patterns along the length of the sheet material.
Inventors
- 👤 William P Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:33
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/24; B29; B29C; B29C59/00; B29C59/02; B29C59/022; B44F; B44F1/00; G; G02; G02B; G02B5/00; G02B5/12; G02B5/126; B29C59/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |