Patent US2913773A successfully refreshed from Google Patents.
US2913773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating unbacked surface coverings
Assignee: Armstrong World Industries Inc
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Filing: 1956-11-06
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Granted: 1959-11-24
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Expires: 1976-11-06
Abstract
No abstract record available.
Inventors
- 👤 Lloyd V Hassel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:26
CPC Classifications
B; B29; B29D; B29D7/00; B29D7/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A METHOD OF FORMING A LOOSE PARTICULATED VINYL PLASTIC MASS INTO AN UNSUPPORTED SHEET, THE STEPS COMPRISING PROVIDING BETWEEN THE SURFACES OF SAID LOOSE MASS AND A POROUS CARRIER UPON WHICH SAID MASS IS SUPPORTED A GAS-PERVIOUS RELEASE LAYER OF METHYL CELLULOSE, WITH SAID VINYL PLASTIC MASS LYING IN DIRECT ENGAGEMENT WITH SAID METHYL CELLULOSE LAYER, FUSING SAID PARTICULATED VINYL PLASTIC MASS INTO A HOMOGENEOUS SHEET BY THE APPLICATION OF HEAT AND PRESSURE THERETO WITH THE ESCAPE OF GAS THROUGH SAID METHYL CELLULOSE RELEASE LAYER AND SAID POROUS CARRIER, DISCONTINUING THE APPLICATION OF PRESSURE, AND STRIPPING THE VINYL PLASTIC SHEET SO FORMED FROM SAID CARRIER, SAID RELEASE LAYER OF METHYL CELLULOSE FACILITATING SAID STRIPPING.
Claim 2
Dependent Claim
115 words
IN A METHOD OF FORMING A LOOSE PARTICULATED VINYL PLASTIC MASS INTO AN UNSUPPORTED SHEET, THE STEPS COMPRISING PROVIDING BETWEEN THE SURFACES OF SAID LOOSE MASS AND A POROUS CARRIER UPON WHICH SAID MASS IS SUPPORTED A GAS-PERVIOUS RELEASE LAYER OF METHYL CELLULOSE, WITH SAID VINYL PLASTIC MASS LYING IN DIRECT ENGAGEMENT WITH SAID METHYL CELLULOSE LAYER, FUSING SAID PARTICULATED VINYL PLASTIC MASS INTO A HOMOGENEOUS SHEET BY THE APPLICATION OF HEAT AND PRESSURE THERETO WITH THE ESCAPE OF GAS THROUGH SAID METHYL CELLULOSE RELEASE LAYER AND SAID POROUS CARRIER, DISCONTINUING THE APPLICATION OF PRESSURE, AND STRIPPING THE VINYL PLASTIC SHEET SO FORMED FROM SAID CARRIER, SAID RELEASE LAYER OF METHYL CELLULOSE FACILITATING SAID STRIPPING.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |