US2849028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular products and method of manufacture
Assignee: Armstrong World Industries Inc
•
Filing: 1955-10-03
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Granted: 1958-08-26
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Expires: 1975-10-03
Abstract
No abstract record available.
Inventors
- 👤 Clark Lawrence
- 👤 Thaddeus J Grabowski
- 👤 Algirdas C Poshkus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:36
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/104; C08J9/105; C08J9/0061; C08J2309/00; C08J2309/02; C08J2457/00; Y; Y10; Y10S; Y10S138/00; Y10S138/09; Y10S264/00; Y10S264/13; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/1386
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
139 words
THE METHOD OF MAKING A HOLLOW, CYLINDRICAL, FLEXIBLE, SUBSTANTIALLY CLOSED-CELL CELLULAR ARTICLE WHICH COMPRISES BLENDING A THERMOPLASTIC POLYVINYL RESIN HAVING A LONG MELTING POINT RANGE WITH A RUBBERY BUTADIENE COPOLYMER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE-STRYRENE AND BUTADIENE ACRYLONITRILE COPOLYMERS, SAID RESIN BEING PRESENT IN AN AMOUNT IN THE RANGE OF ABOUT 25-45 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID RUBBER, ADDING FILLER AND PLASTICIZER TO SAID MIX, INTIMATELY BLENDING A BLOWING AGENT CONSISTING OF P,P''-OXYBIS (BENZENE SULFONYL HYDROZIDE) THEREIN IN AN AMOUNT OF ABOUT 1-25 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID RUBBER TO FORM A SULFUR-FREE MIXTURE, EXTRUDING RESULTING MIXTURE TO FORM A HOLLOW, CYLINDRICAL OBJECT, AND HEATING SAID OBJECT AT A TEMPERATURE SUFFICIENT TO DECOMPOSE SAID BLOWING AGENT TO ISOTROPICALLY EXPAND SAID OBJECT IN THE ABSENCE OF A MOLD.
Claim 2
Independent Claim
139 words
THE METHOD OF MAKING A HOLLOW, CYLINDRICAL, FLEXIBLE, SUBSTANTIALLY CLOSED-CELL CELLULAR ARTICLE WHICH COMPRISES BLENDING A THERMOPLASTIC POLYVINYL RESIN HAVING A LONG MELTING POINT RANGE WITH A RUBBERY BUTADIENE COPOLYMER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE-STRYRENE AND BUTADIENE ACRYLONITRILE COPOLYMERS, SAID RESIN BEING PRESENT IN AN AMOUNT IN THE RANGE OF ABOUT 25-45 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID RUBBER, ADDING FILLER AND PLASTICIZER TO SAID MIX, INTIMATELY BLENDING A BLOWING AGENT CONSISTING OF P,P''-OXYBIS (BENZENE SULFONYL HYDROZIDE) THEREIN IN AN AMOUNT OF ABOUT 1-25 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID RUBBER TO FORM A SULFUR-FREE MIXTURE, EXTRUDING RESULTING MIXTURE TO FORM A HOLLOW, CYLINDRICAL OBJECT, AND HEATING SAID OBJECT AT A TEMPERATURE SUFFICIENT TO DECOMPOSE SAID BLOWING AGENT TO ISOTROPICALLY EXPAND SAID OBJECT IN THE ABSENCE OF A MOLD.
Claim 3
Dependent Claim
75 words
A HOLLOW, CYLINDRICAL ARTICLE COMPRISING A FLEXIBLE SUBSTANTIALLY CLOSED-CELL, CELLULAR, CURED, SULFUR-FREE COMPOSITION COMPRISING A RUBBERY BUTADIENE COPOLYMER SEELCTED FROM THE GROUP CONSISTING OF BUTADIENE-STRYRENE AND BUTADIENE-ACRYLONITRILE COPOLYMERS, A THERMOPLASTIC POLYVINYL RESIN HAVING A LONG MELTING POINT RANGE IN AN AMOUNT IN THE RANGE OF ABOUT 25-45 PARTS BY WEIGHT PER EACH 100 PARTS BY WEIGHT OF SAID RUBBER, PLASTICIZER, AND FILLER, SAID CELLS BEING FORMED BY THE GASEOUS DECOMPOSITION PRODUCTS OF P,P''-OXYBIS (BENZENE HYDRAZIDE).
Claim 4
Dependent Claim
75 words
A HOLLOW, CYLINDRICAL ARTICLE COMPRISING A FLEXIBLE SUBSTANTIALLY CLOSED-CELL, CELLULAR, CURED, SULFUR-FREE COMPOSITION COMPRISING A RUBBERY BUTADIENE COPOLYMER SEELCTED FROM THE GROUP CONSISTING OF BUTADIENE-STRYRENE AND BUTADIENE-ACRYLONITRILE COPOLYMERS, A THERMOPLASTIC POLYVINYL RESIN HAVING A LONG MELTING POINT RANGE IN AN AMOUNT IN THE RANGE OF ABOUT 25-45 PARTS BY WEIGHT PER EACH 100 PARTS BY WEIGHT OF SAID RUBBER, PLASTICIZER, AND FILLER, SAID CELLS BEING FORMED BY THE GASEOUS DECOMPOSITION PRODUCTS OF P,P''-OXYBIS (BENZENE HYDRAZIDE).
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |