US2772141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of plastic floor covering
Assignee: Armstrong World Industries Inc
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Filing: 1952-02-26
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Granted: 1956-11-27
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Expires: 1972-02-26
Abstract
No abstract record available.
Inventors
- 👤 Lawrence H Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:20
CPC Classifications
D; D06; D06N; D06N7/00; D06N7/0005; D06N3/00; D06N3/0086; D06N3/0088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A METHOD FO FORMING A VINYL PLASTIC MASS, THE STEPS COMPRISING PROVIDING BETWEEN THE SURFACE OF SAID MASS AND A PRESSING SURFACE A RELEASE LAYER OF A COMPLEX COMPOUND OF THE WERNER TYPE IN WHICH A TRIVALENT NUCLEAR CHROMIUM ATOM IS COORDINATED WITH AN ACYCLIC CARBOXYLIC ACIDO GROUP HAVING AT LEAST 10 CARBON ATOMS, WITH SAID RELEASE LAYER LYING IN DIRECT ENGAGEMENT WITH SAID VINYL PLASTIC MASS, FORMING SAID VINYL PLASTIC MASS BY THE APPLICATION OF HEAT AND PRESSURE THERETO THROUGH SAID RELEASE LAYER, DISCONTINUING THE APPLICATION OF PRESSURE, AND RELEASING SAID FORMED VINYL PLASTIC MASS FROM SAID PRESSING SURFACE, SAID LAYER FACILITATING SAID RELEASE.
Claim 2
Dependent Claim
106 words
IN A METHOD FO FORMING A VINYL PLASTIC MASS, THE STEPS COMPRISING PROVIDING BETWEEN THE SURFACE OF SAID MASS AND A PRESSING SURFACE A RELEASE LAYER OF A COMPLEX COMPOUND OF THE WERNER TYPE IN WHICH A TRIVALENT NUCLEAR CHROMIUM ATOM IS COORDINATED WITH AN ACYCLIC CARBOXYLIC ACIDO GROUP HAVING AT LEAST 10 CARBON ATOMS, WITH SAID RELEASE LAYER LYING IN DIRECT ENGAGEMENT WITH SAID VINYL PLASTIC MASS, FORMING SAID VINYL PLASTIC MASS BY THE APPLICATION OF HEAT AND PRESSURE THERETO THROUGH SAID RELEASE LAYER, DISCONTINUING THE APPLICATION OF PRESSURE, AND RELEASING SAID FORMED VINYL PLASTIC MASS FROM SAID PRESSING SURFACE, SAID LAYER FACILITATING SAID RELEASE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |