US3050432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for compressing cellular polyurethane plastic
Assignee: Bayer AG
•
Filing: 1957-10-25
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Granted: 1962-08-21
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Expires: 1977-10-25
Abstract
No abstract record available.
Inventors
- 👤 Weinbrenner Erwin
- 👤 Tischbein Wilhelm
- 👤 Hoppe Peter
- 👤 Brochhagen Franzkarl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:16
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; B; B32; B32B; B32B27/00; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/918; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD FOR CONVERTING A NORMALLY AIR AND WATER VAPOR IMPERVIOUS SOLID CELLULAR POLYURETHANE PLASTIC INTO A POROUS WEB WHICH IS PERVIOUS TO AIR BUT IS IMPERVIOUS TO LIQUID WHICH COMPRISES COMPRESSING THE CELLULAR PLASTIC AT A TEMPERATURE ABOVE 20*C. UNDER A PRESSURE OF FROM ABOUT 5 TO ABOUT 200 ATMOSPHERS UNTIL THE THICKNESS OF THE CELLULAR PLASTIC REMAINS AT FROM ABOUT 5 PERCENT TO ABOUT 15 PERCENT OF ITS ORIGINAL THICKNESS AFTER THE PRESSURE HAS BEEN REMOVED.
Claim 2
Independent Claim
78 words
A METHOD FOR CONVERTING A NORMALLY AIR AND WATER VAPOR IMPERVIOUS SOLID CELLULAR POLYURETHANE PLASTIC INTO A POROUS WEB WHICH IS PERVIOUS TO AIR BUT IS IMPERVIOUS TO LIQUID WHICH COMPRISES COMPRESSING THE CELLULAR PLASTIC AT A TEMPERATURE ABOVE 20*C. UNDER A PRESSURE OF FROM ABOUT 5 TO ABOUT 200 ATMOSPHERS UNTIL THE THICKNESS OF THE CELLULAR PLASTIC REMAINS AT FROM ABOUT 5 PERCENT TO ABOUT 15 PERCENT OF ITS ORIGINAL THICKNESS AFTER THE PRESSURE HAS BEEN REMOVED.
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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) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |