US3085896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making foamed polyurethanes
Assignee: Interchemical Corp
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Filing: 1958-02-10
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Granted: 1963-04-16
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Expires: 1978-02-10
Abstract
No abstract record available.
Inventors
- 👤 Norman G Britt
- 👤 Loy S Engle
- 👤 Felix P Carroll
- 👤 Blumberg Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; B; B32; B32B; B32B27/00; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4244; C08G18/4247; C08G18/48; D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C08G2110/00; C08G2110/0008; C08G2110/0025; C08G2110/0033; C08G2110/0041; C08G2110/0083; C08G2150/00; C08G2150/60; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A PROCESS OF PRODUCING A FLOCKED LAYER OF POLYURETHANE FOAM COMPRISING (1) PREPARING AN INTIMATE ADMIXTURE OF A HYDROPHOBIC ISOCYANATE-CONTAINING PREPOLYMER AND AT LEAST 1/4 ITS WEIGHT OF A SUITABLY THICKENED WATER PHASE, (2) DISTRIBUTING THE RESULTING EMULSION OVER THE SURFACE OF A SUBSTRATE, (3) HEATING THE WET EMULSION FILM TO CAUSE IT TO EXPAND TO A FOAM, AND (4) APPLYING SHORT LENGTHS OF FILAMENT MATERIAL TO THE RESULTING FOAM BEFORE IT CEASES TO BE TACKY.
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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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |