US3763301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for densifying a microporous elastomeric polyurethane sheet material
Assignee: IMMONT CORP
•
Filing: 1970-08-04
•
Granted: 1973-10-02
•
Expires: 1990-08-04
Abstract
Abstract PROCESS FOR SELECTIVELY DENSIFYING A MICROPOROUS ELASTOMIC POLYURETHANE SHEET MATERIAL BY WETTING THE SHEET WITH WATER AND PRESSING IT AGAINST A HOT SURFACE. THE MICROPOROUS ELASTOMERIC POLYURETHANE SHEET MATERIAL IS WETTED WITH WATER AND THEN SELECTIVELY OR COMPLETELY COMPRESSED AT A TEMPERATURE WELL BELOW THE "COLLAPSE TEMPERATURE" OF THE SHEET UNTIL THE SHEET IS LOCALLY OR COMPLETELY DENSIFIED AND THEN THE SHEET IS DRIED. THE FINAL PRODUCT IS USEFUL IN MAKING SHOE UPPERS.
Inventors
- 👤 F Civardi
- 👤 C Lattarulo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |