US2926389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for modifying foam structures
Assignee: EIDP Inc
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Filing: 1958-03-04
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Granted: 1960-03-01
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Expires: 1978-03-04
Abstract
No abstract record available.
Inventors
- 👤 Garlington William Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:04
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S264/00; Y10S264/14; Y10T; Y10T428/00; Y10T428/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN THE PROCESS FOR FORMING POLYURTHANE FOAM STRUCTURES WHEREIN A POLYURETHANE PRODUCT CONTAININA A PLURALITY OF FREE ISOCYANATE GROUPS IN REACTED WITH WATER WITH RESULTANT FOAMING AND THE FORMATION OF A FOAM STRUCTURE, AND SAID STRUCTURE IS THEREAFTER CURED, THE IMPROVEMENT WHICH COMPRISES APPLYING TO A SURFACE OF SAID STRUCTURE WITHIN THE TIME RANGE OF FROM 1.5-8 MINUTES AFTER COMPLETION OF FOAMING AND BEFORE CURING, FROM 18 TO 34 GRAMS PER SQUARE METER OF SAID SURFACE OF A LIQUID ORGANIC SOLVENT FOR THE UNCURED FOAM STRUCTURE WHEREBY TO PREVENT FORMATION OF SKIN OVER SAID SURFACE AND TO PRODUCE A POROUS SURFACE THE PORES OF WHICH ARE ENLARGED AND HAVE WALLS HAVING A MEANS THICKNESS FROM 1.5-20 TIMES THE MEANS THICKNESS OF THE WALLS OF THE INTERIOR PORES OF SAID FOAM STRUCTURE.
Claim 2
Dependent Claim
131 words
IN THE PROCESS FOR FORMING POLYURTHANE FOAM STRUCTURES WHEREIN A POLYURETHANE PRODUCT CONTAININA A PLURALITY OF FREE ISOCYANATE GROUPS IN REACTED WITH WATER WITH RESULTANT FOAMING AND THE FORMATION OF A FOAM STRUCTURE, AND SAID STRUCTURE IS THEREAFTER CURED, THE IMPROVEMENT WHICH COMPRISES APPLYING TO A SURFACE OF SAID STRUCTURE WITHIN THE TIME RANGE OF FROM 1.5-8 MINUTES AFTER COMPLETION OF FOAMING AND BEFORE CURING, FROM 18 TO 34 GRAMS PER SQUARE METER OF SAID SURFACE OF A LIQUID ORGANIC SOLVENT FOR THE UNCURED FOAM STRUCTURE WHEREBY TO PREVENT FORMATION OF SKIN OVER SAID SURFACE AND TO PRODUCE A POROUS SURFACE THE PORES OF WHICH ARE ENLARGED AND HAVE WALLS HAVING A MEANS THICKNESS FROM 1.5-20 TIMES THE MEANS THICKNESS OF THE WALLS OF THE INTERIOR PORES OF SAID FOAM STRUCTURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |