Patent US3457696A successfully refreshed from Google Patents.
US3749593A
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Laminated materials and method of preparation
Assignee: H P SMITH PAPERCO AN IL CORP
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Filing: 1971-09-24
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Granted: 1973-07-31
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Expires: 1991-09-24
Abstract
Abstract A LAMINATE MATERIAL IS PRODUCED BY COATING A SUBSTRATE WITH A FIRST SILICONE RELEASE COATING CONTAINING A CURING, CATALYST, A CURING ACCELERATOR AND/OR AN ADHESION PROMOTER AND SUBSEQUENTLY OVERCOATING SAID FIRST SILICONE RELEASE COATING WITH A SECOND SILICONE RELEASE AGENT COATING CONTAINING A CURING CATALYST BUT NO CURE ACCELERATOR OR ADHESION PROMOTER. THE LAMINATES ARE PARTICULARLY USEFUL AS RELEASE SHEETS.
Inventors
- 👤 L Keiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:52
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; B; B44; B44C; B44C1/00; B44C1/16; B44C1/165; B44C1/17; B44C1/1708; D21H19/10; D21H19/14; D21H19/20; D21H19/22; D21H19/24; D21H19/32; D21H19/84; D21H27/00; D21H27/001; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1438; Y10T428/1443; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |