Patent US3239585A successfully refreshed from Google Patents.
US3239585A
Expired / Lapsed
US
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Shock treatment of plastic foams
Assignee: Dow Chemical Co
•
Filing: 1962-05-11
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Granted: 1966-03-08
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Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 Karpovich John
- 👤 Willard F Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:17
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/38; B; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/5618; B29C44/5627; Y; Y10; Y10S; Y10S264/00; Y10S264/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A METHOD FOR SUBSTANTIALLY INCREASING THE ACOUSTICAL ABSORPTION ROPERTIES OF A POLYSTYRENE FOAM BLOCK UP TO ABOUT 4 INCHES THICK, SAID METHOD COMPRISING IMMERSING SAID BLOCK IN A BODY OF NON-SOLVENT AQUEOUS LIQUID, AND SUDDENLY IMPACTING SAID LIQUID ADAJCENT SAID BLOCK WITH ABOUT 3000 FOOT-POUNDS OF ENERGY.
Claim 2
Independent Claim
47 words
A METHOD FOR SUBSTANTIALLY INCREASING THE ACOUSTICAL ABSORPTION ROPERTIES OF A POLYSTYRENE FOAM BLOCK UP TO ABOUT 4 INCHES THICK, SAID METHOD COMPRISING IMMERSING SAID BLOCK IN A BODY OF NON-SOLVENT AQUEOUS LIQUID, AND SUDDENLY IMPACTING SAID LIQUID ADAJCENT SAID BLOCK WITH ABOUT 3000 FOOT-POUNDS OF ENERGY.
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |