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Patent US2880090A successfully refreshed from Google Patents.
US2880090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asbestos-backed plastic surface covering
Assignee: Armstrong World Industries Inc
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Filing: 1956-11-20
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Granted: 1959-03-31
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Expires: 1976-11-20
Abstract
No abstract record available.
Inventors
- 👤 Jr David A Feigley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:46
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE METHOD OF MAKING A SURFACE COVERING MATERIAL WHICH COMPRISES FORMING A SLURY OF ASBESTOS FIBERS IN WATER, WHEREBY SAID FIBERS RELASE MAGNESIUM IONS INTO SAID WATER, DEPOSITING A SYNTHETIC RUBBER BINDER ON SAID FIBERS TO FORM RUBBER-COATED FIBERS, ADDING TO THE RESULTBY THE MAGNESIUM SALT OF SAID POLYACRYLIC ACID DEPOSITS ON SAID RUBBER-COATED FIBERS, FORMING THE RESULTING SLURY OF COATED FIBERS INTO SHEET, DEPOSITING ON SAID SHEET A LAYER OF PARTICLES, SAID PARTICLES COMPRISING A HOMOGENEOUS MIXTURE OF A POLYMERIZED VINYL HALIDE RESIN AND PLASTICIZER FOR SAID RESIN, AND SUBJECTING SAID LAYER ON SAID SHEET TO HEAT AND PRESSURE TO FUSE SAID PARTICLES AND TO ADHERE SAID LAYER TO SAID SHEET, WHEREBY A SMOOTH, HARD, FLEXIBLE WEARING SURFACE IS FORMED.
Claim 2
Independent Claim
121 words
THE METHOD OF MAKING A SURFACE COVERING MATERIAL WHICH COMPRISES FORMING A SLURY OF ASBESTOS FIBERS IN WATER, WHEREBY SAID FIBERS RELASE MAGNESIUM IONS INTO SAID WATER, DEPOSITING A SYNTHETIC RUBBER BINDER ON SAID FIBERS TO FORM RUBBER-COATED FIBERS, ADDING TO THE RESULTBY THE MAGNESIUM SALT OF SAID POLYACRYLIC ACID DEPOSITS ON SAID RUBBER-COATED FIBERS, FORMING THE RESULTING SLURY OF COATED FIBERS INTO SHEET, DEPOSITING ON SAID SHEET A LAYER OF PARTICLES, SAID PARTICLES COMPRISING A HOMOGENEOUS MIXTURE OF A POLYMERIZED VINYL HALIDE RESIN AND PLASTICIZER FOR SAID RESIN, AND SUBJECTING SAID LAYER ON SAID SHEET TO HEAT AND PRESSURE TO FUSE SAID PARTICLES AND TO ADHERE SAID LAYER TO SAID SHEET, WHEREBY A SMOOTH, HARD, FLEXIBLE WEARING SURFACE IS FORMED.
References Cited (Backward Citations)
US1976679A
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US2133693A
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US2315675A
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US2430934A
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US2759813A
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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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |