US3788872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of embossing
Assignee: Armstrong World Industries Inc
•
Filing: 1971-11-08
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Granted: 1974-01-29
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Expires: 1991-11-08
Abstract
Abstract A LAYER OF LIQUID MATERIAL IS PLACED ON A BACKING SHEET. THE BACKING SHEET AND LIQUID LAYER PASS THROUGH AN EMBOSSING STRUCTURE WHICH FUSES OR GELS THE LIQUID LAYER TO PLACE IT IN A SOLID OR SEMI-SOLID STATE. THE RAISED AREAS OF THE EMBOSSING ROLL PRESS DOWN AGAINST THE LIQUID LAYER AND ENGAGE THE BACKING SHEET TO FORM AREAS WHERE THE LIQUID HAS BEEN COMPLETELY SQUEEZED OUT FROM BETWEEN THE BACKING SHEET AND THE RAISED AREA OF THE EMBOSSING ROLL.
Inventors
- 👤 D Sigman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:13
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/24; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |