US2764565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the manufacture of polyurethane plastics
Assignee: Bayer AG
•
Filing: 1955-08-08
•
Granted: 1956-09-25
•
Expires: 1975-08-08
Abstract
No abstract record available.
Inventors
- 👤 Hoppe Peter
- 👤 Weinbrenner Erwin
- 👤 Muhlhausen Cornelius
- 👤 Breer Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:54
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/26; B29; B29B; B29B7/00; B29B7/74; B29B7/7476; B29B7/748; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0895; B01J2219/00; B01J2219/00049; B01J2219/00051; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/908; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A PROCESS FOR PRODUCING SOLID POLYURETHANE PLASTIC COMPRISING BRINGING TOGETHER IN AN ENCLOSED MIXING ZONE AN ORGANIC COMPOUND HAVING AT LEAST TWO REACTIVE HYDROGEN ATOMS, SAID ORGANIC COMPOUND BEING CAPABLE OF FORMING POLYURETHANES, A POLYISOCYANATE AND A COMPONENT INFLUENCING THE REACTION LEADING TO THE FORMATION OF SAID SOLID POLYURETHANE PLASTICS, THE IMPROVEMENT WHICH COMPRISING INJECTING AT LEAST ONE OF THE TWO LAST-MENTIONED COMPONENTS INTO SAID MIXING ZONE INTERMITTENTLY AT HIGH FREQUENCY AT A PRESSURE SUBSTANTIALLY HIGHER THAN THAT IN SAID MIXING ZONE AND THEREBY EFFECTING SUBSTANTAILLY INSTANTANEOUS AND INTIMATE MIXING OF SAID COMPONENTS, AND THEN DISCHARGING THE RESULTING MIXTURE WHILE IN A LIQUID STATE FROM SAID MIXING ZONE INTO A ZONE WHERE CONVERSION OF SAID LIQUID MIXTURE INTO SAID SOLID POLYURETHANE PLASTIC TAKES PLACE.
Claim 2
Dependent Claim
125 words
IN A PROCESS FOR PRODUCING SOLID POLYURETHANE PLASTIC COMPRISING BRINGING TOGETHER IN AN ENCLOSED MIXING ZONE AN ORGANIC COMPOUND HAVING AT LEAST TWO REACTIVE HYDROGEN ATOMS, SAID ORGANIC COMPOUND BEING CAPABLE OF FORMING POLYURETHANES, A POLYISOCYANATE AND A COMPONENT INFLUENCING THE REACTION LEADING TO THE FORMATION OF SAID SOLID POLYURETHANE PLASTICS, THE IMPROVEMENT WHICH COMPRISING INJECTING AT LEAST ONE OF THE TWO LAST-MENTIONED COMPONENTS INTO SAID MIXING ZONE INTERMITTENTLY AT HIGH FREQUENCY AT A PRESSURE SUBSTANTIALLY HIGHER THAN THAT IN SAID MIXING ZONE AND THEREBY EFFECTING SUBSTANTAILLY INSTANTANEOUS AND INTIMATE MIXING OF SAID COMPONENTS, AND THEN DISCHARGING THE RESULTING MIXTURE WHILE IN A LIQUID STATE FROM SAID MIXING ZONE INTO A ZONE WHERE CONVERSION OF SAID LIQUID MIXTURE INTO SAID SOLID POLYURETHANE PLASTIC TAKES PLACE.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |