Patent US2570311A successfully refreshed from Google Patents.
US3871897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed olefin polymer wallpaper
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1973-03-06
•
Granted: 1975-03-18
•
Expires: 1993-03-06
Abstract
Abstract Wallpaper consisting of an open celled foamed olefin polymer film having a thickness of 0.014 to 0.065 inch, a density of from 0.05 to 0.5 g cm-3, an average cell diameter of from 120 to 250 Mu m, an air permeability of at least 0.0075 ml cm-2 sec-1cm head-1 mil thickness and a water vapour permeability of from 500 to 10000 g m-2 day-1 mil thickness.
Inventors
- 👤 Cyril John Ealding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:54
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
WALLPAPER COMPRISING A FOAMED FILM OF AT LEAST ONE OLEFIN POLYMER SELECTED FROM HOMOPOLYMERS OF ETHYLENE, PROPYLENE, BUTENE-1 AND 4-METHYL PENTENE-1, AND COPOLYMERS OF AT LEAST TWO OLEFINS SELECTED FROM ETHYLENE, PROPYLENE, BUTENE-1 AND 4-METHYL PENTENE-1, HAVING A PRINTED REPEATING PATTERN ON ONE SIDE THEREOF, SAID FILM HAVING I. A THICKNESS OF FROM 0.014 TO 0.065 IN, II. A DENSITY OF FROM 0.05 TO 0.5 G CM-3, III. AN AVERAGE CELL DIAMETER OF FROM 120 TO 250 UM, IV. AN AIR PERMEABILITY OF AT LEAST 0.0075 ML CM-2 SEC-1 CM HEAD-1 MIL THICKNESS, V. A WATER VAPOUR PERMEABILITY OF FROM 500 TO 10000 G M-2 DAY-1 MIL THICKNESS, AND VI. AT LEAST 50% OF THE VOLUME OF THE FILM COMPRISING OPEN CELLS.
Claim 2
Dependent Claim
122 words
WALLPAPER COMPRISING A FOAMED FILM OF AT LEAST ONE OLEFIN POLYMER SELECTED FROM HOMOPOLYMERS OF ETHYLENE, PROPYLENE, BUTENE-1 AND 4-METHYL PENTENE-1, AND COPOLYMERS OF AT LEAST TWO OLEFINS SELECTED FROM ETHYLENE, PROPYLENE, BUTENE-1 AND 4-METHYL PENTENE-1, HAVING A PRINTED REPEATING PATTERN ON ONE SIDE THEREOF, SAID FILM HAVING I. A THICKNESS OF FROM 0.014 TO 0.065 IN, II. A DENSITY OF FROM 0.05 TO 0.5 G CM-3, III. AN AVERAGE CELL DIAMETER OF FROM 120 TO 250 UM, IV. AN AIR PERMEABILITY OF AT LEAST 0.0075 ML CM-2 SEC-1 CM HEAD-1 MIL THICKNESS, V. A WATER VAPOUR PERMEABILITY OF FROM 500 TO 10000 G M-2 DAY-1 MIL THICKNESS, AND VI. AT LEAST 50% OF THE VOLUME OF THE FILM COMPRISING OPEN CELLS.
Claim 3
Dependent Claim
27 words
Wallpaper as claimed in claim 1 wherein the film has a water permeability of at least 12 ml m 2 min 1 cm head 1 mil thickness.
Claim 4
Dependent Claim
20 words
Wallpaper as claimed in claim 1 wherein the film has a density of from 0.1 to 0.4 g cm 3.
References Cited (Backward Citations)
US3227784A
Cited
US3281259A
Cited
US3452123A
Cited
US3408218A
Cited
US3287477A
Cited
US3491173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |