Patent US3047449A successfully refreshed from Google Patents.
US3047449A
Expired / Lapsed
US
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Process for preparing a thin cellular polyurethane layer of uniform thickness
Assignee: EIDP Inc
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Filing: 1958-01-16
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Granted: 1962-07-31
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Expires: 1978-01-16
Abstract
No abstract record available.
Inventors
- 👤 George W Coble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:09
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/48; B29C44/485; Y; Y10; Y10S; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR FORMING A THIN CELLULAR LAYER BETWEEN TWO SHEETS OF FLEXIBLE MATERIAL WHEREIN TWO SUPERIMPOSED SHEETS OF SAID FLEXIBLE MATERIAL ARE HORIZONTALLY PASSED, AT THE SAME SPEED, THROUGH A PAIR OF ROLLERS PRECEDED BY INTRODUCING A FOAMABLE MIXTURE CONTAINING AN ISOCYANATETERMINATED POLYURETHANE, WATER, AND A TERTIARY AMINE BETWEEN SAID SHEETS PRIOR TO PASSING SAID SHEETS WITH INTERDEPOSED FOAMABLE MIXTURE THROUGH SAID ROLLS SAID FOAMABLE MIXTURE BEING SPREAD UNIFORMLY BETWEEN SAID FLEXIBLE SHEETS FOLLOWED BY PASSING SAID SHEETS AND INTERDEPOSED FOAMABLE MIXTURE THROUGH A HEATED ZONE MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 55 TO 75*C. WHEREIN SAID MIXTURE EXPANDS TO FORM A THIN UNIFORM CELLULAR LAYER BETWEEN SAID FLEXIBLE SHEETS.
Claim 2
Dependent Claim
111 words
A PROCESS FOR FORMING A THIN CELLULAR LAYER BETWEEN TWO SHEETS OF FLEXIBLE MATERIAL WHEREIN TWO SUPERIMPOSED SHEETS OF SAID FLEXIBLE MATERIAL ARE HORIZONTALLY PASSED, AT THE SAME SPEED, THROUGH A PAIR OF ROLLERS PRECEDED BY INTRODUCING A FOAMABLE MIXTURE CONTAINING AN ISOCYANATETERMINATED POLYURETHANE, WATER, AND A TERTIARY AMINE BETWEEN SAID SHEETS PRIOR TO PASSING SAID SHEETS WITH INTERDEPOSED FOAMABLE MIXTURE THROUGH SAID ROLLS SAID FOAMABLE MIXTURE BEING SPREAD UNIFORMLY BETWEEN SAID FLEXIBLE SHEETS FOLLOWED BY PASSING SAID SHEETS AND INTERDEPOSED FOAMABLE MIXTURE THROUGH A HEATED ZONE MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 55 TO 75*C. WHEREIN SAID MIXTURE EXPANDS TO FORM A THIN UNIFORM CELLULAR LAYER BETWEEN SAID FLEXIBLE SHEETS.
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) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |