US3249661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for casting thin cellular foam sheets
Assignee: Specialty Converters Inc
•
Filing: 1962-12-10
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Granted: 1966-05-03
•
Expires: 1982-12-10
Abstract
No abstract record available.
Inventors
- 👤 Willy John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:56
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/28; Y; Y10; Y10S; Y10S521/00; Y10S521/917; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249987; Y10T428/249988; Y10T428/249989; Y10T428/249991; Y10T428/249992
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN CASTING THIN CELLULAR FOAM SHEET, WHEREIN A CHEMICAL FOAM MIXTURE IS SPREAD AND METERED BY A PAIR OF METERING MEMBERS, THE IMPROVEMENT IN COMBINATION THEREWITH OF A METHOD OF CONTROLLING THE THICKNESS OF THE RESULTANT FOAM SHEET COMPRISING, LOCATING THE METERING MEMBERS IN RELATION TO EACH OTHER BY PRESSURE, ADJUSTING THE PRESSURE TO LIMIT THE AMOUNT OF FOAM MIXTURE WHICH CAN PASS BETWEEN SAID MEMBERS AND THEREBY DETERMINE THE THICKNESS OF THE RESULTANT FOAM SHEET, AND EXPANDING THE FOAM MIXTURE AFTER PASSING BETWEEN THE METERING MEMBERS.
Claim 2
Dependent Claim
87 words
IN CASTING THIN CELLULAR FOAM SHEET, WHEREIN A CHEMICAL FOAM MIXTURE IS SPREAD AND METERED BY A PAIR OF METERING MEMBERS, THE IMPROVEMENT IN COMBINATION THEREWITH OF A METHOD OF CONTROLLING THE THICKNESS OF THE RESULTANT FOAM SHEET COMPRISING, LOCATING THE METERING MEMBERS IN RELATION TO EACH OTHER BY PRESSURE, ADJUSTING THE PRESSURE TO LIMIT THE AMOUNT OF FOAM MIXTURE WHICH CAN PASS BETWEEN SAID MEMBERS AND THEREBY DETERMINE THE THICKNESS OF THE RESULTANT FOAM SHEET, AND EXPANDING THE FOAM MIXTURE AFTER PASSING BETWEEN THE METERING MEMBERS.
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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 |