US2885268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the production of porous or homogeneous plastic semi-finished products or finshed articles, more especially those based on polyurethanes
Assignee: Bayer AG
•
Filing: 1955-06-03
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Granted: 1959-05-05
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Expires: 1975-06-03
Abstract
No abstract record available.
Inventors
- 👤 Breer Karl
- 👤 Weinbrenner Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:29
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/32; B29B7/74; B29B7/7476; B29B7/748; B29B7/76; B29B7/7631; Y; Y10; Y10S; Y10S424/00; Y10S424/07; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AN APPARATUS FOR PRODUCIG POROUS AND HOMOGENEOUS POLYURETHANE PLASTICS, COMPRISING IN COMBINATION AN ENCLOSED MIXING CYLINDER, A PISTON DISPOSED IN SAID CYLINDER HAVING AN ANNULAR GROOVE FORMED NEAR THE END THEREOF, MEANS FOR INTRODUCING UNDER PRESSURE AT LEAST ONE OF THE COMPONENTS USED TO PRODUCE SAID PLASTICS INTO SAID GROVE AND THEN INTO THE CYLINDER SPACE OF SAID MIXING CYLINDER, MEANS FOR INTRODUCING UNDER PRESSURE ANOTHER OF SAID COMPONENTS INTO SAID MIXING CLYLINDER
Claim 2
Independent Claim
73 words
AN APPARATUS FOR PRODUCIG POROUS AND HOMOGENEOUS POLYURETHANE PLASTICS, COMPRISING IN COMBINATION AN ENCLOSED MIXING CYLINDER, A PISTON DISPOSED IN SAID CYLINDER HAVING AN ANNULAR GROOVE FORMED NEAR THE END THEREOF, MEANS FOR INTRODUCING UNDER PRESSURE AT LEAST ONE OF THE COMPONENTS USED TO PRODUCE SAID PLASTICS INTO SAID GROVE AND THEN INTO THE CYLINDER SPACE OF SAID MIXING CYLINDER, MEANS FOR INTRODUCING UNDER PRESSURE ANOTHER OF SAID COMPONENTS INTO SAID MIXING CLYLINDER
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |