US2548438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicellular acrylic resin
Assignee: Rohm and Haas Co
•
Filing: 1948-11-24
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Granted: 1951-04-10
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Expires: 1968-11-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Mcloughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:20
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08J2333/00; C08J2333/04; C08J2333/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE PROCESS FOR PREPARING OBJECTS OF HARD ACRYLIC RESIN HAVING THEREIN A MULTIPLICITY OF SMALL GAS CELLS SURROUNDED BY SAID RESIN IN THE FORM OF A CONTINUOUS SKELETAL STRUCTURE WHICH COMPRISES MIXING AN ACRYLIC ESTER WHICH YIELDS HARD, SOLID POLYMERS AND AN ORGANIC PEROXIDE WHICH DECOMPOSES WHEN BOILED IN TOLUENE, THE AMOUNT OF PEROXIDE BEING 6% TO 10% OF THE WEIGHT OF SAID ESTER, POLYMERIZING SAID ESTER AT O* C. TO 40* C. IN THE PRESENCE OF SAID PEROXIDE UNTIL A POLYMERIC SOLID IS FORMED AND HEATING THE RESULTING POLYMERIC SOLID AT 110 * C. TO 130* C. TO FORM A POROUS STRUCTURE.
Claim 2
Dependent Claim
103 words
THE PROCESS FOR PREPARING OBJECTS OF HARD ACRYLIC RESIN HAVING THEREIN A MULTIPLICITY OF SMALL GAS CELLS SURROUNDED BY SAID RESIN IN THE FORM OF A CONTINUOUS SKELETAL STRUCTURE WHICH COMPRISES MIXING AN ACRYLIC ESTER WHICH YIELDS HARD, SOLID POLYMERS AND AN ORGANIC PEROXIDE WHICH DECOMPOSES WHEN BOILED IN TOLUENE, THE AMOUNT OF PEROXIDE BEING 6% TO 10% OF THE WEIGHT OF SAID ESTER, POLYMERIZING SAID ESTER AT O* C. TO 40* C. IN THE PRESENCE OF SAID PEROXIDE UNTIL A POLYMERIC SOLID IS FORMED AND HEATING THE RESULTING POLYMERIC SOLID AT 110 * C. TO 130* C. TO FORM A POROUS STRUCTURE.
References Cited (Backward Citations)
US2045651A
Cited
US2299593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |