US3249486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing foamed synthetic resins
Assignee: National Gypsum Co
•
Filing: 1962-06-29
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Granted: 1966-05-03
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Expires: 1982-06-29
Abstract
No abstract record available.
Inventors
- 👤 Walter E Voisinet
- 👤 Melling Elmer Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:07
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/58; B29C44/586; B29C44/20; B29C44/30; B29C44/32; B29C44/321; B29C44/3215; B29C44/36; B29C44/46; B29C44/467; B29K; B29K2075/00; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A RELATIVELY THICK BLOCK OF A RIGID CLOSED CELL POLYURETHANE FOAM HAVING ISOTROPIC PROPERTIES SUCH THAT THE COMPRESSIVE YIELD STRENGHT ALONG ALL AXES WILL BE WITHIN THE RANGE OF ABOUT 15-75 P.S.I. WITH NOT MORE THAN ABOUT 20% VARIATION BETWEEN THE AVERAGE OF THE COMPRESSIVE YIELD STRENGTHS ALONG THE DIMENSIONAL, MUTUALLY PERPENDICULARLY RELATED X, Y, AND Z AXES OF SAID BLOCK AND THE INDIVIDUAL COMPRESSIVE YIELD STRENGTHS ALONG THESE AXES, SAID BLOCK HAVING A THICKNESS OF NOT LESS THAN ABOUT 2" AND A HEIGHT TO WIDTH RATIO WITHIN THE RANGE OF ABOUT 15:1 TO 1:15.
Claim 2
Dependent Claim
95 words
A RELATIVELY THICK BLOCK OF A RIGID CLOSED CELL POLYURETHANE FOAM HAVING ISOTROPIC PROPERTIES SUCH THAT THE COMPRESSIVE YIELD STRENGHT ALONG ALL AXES WILL BE WITHIN THE RANGE OF ABOUT 15-75 P.S.I. WITH NOT MORE THAN ABOUT 20% VARIATION BETWEEN THE AVERAGE OF THE COMPRESSIVE YIELD STRENGTHS ALONG THE DIMENSIONAL, MUTUALLY PERPENDICULARLY RELATED X, Y, AND Z AXES OF SAID BLOCK AND THE INDIVIDUAL COMPRESSIVE YIELD STRENGTHS ALONG THESE AXES, SAID BLOCK HAVING A THICKNESS OF NOT LESS THAN ABOUT 2" AND A HEIGHT TO WIDTH RATIO WITHIN THE RANGE OF ABOUT 15:1 TO 1:15.
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |