Patent US2993233A successfully refreshed from Google Patents.
US2993233A
Expired / Lapsed
US
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Apparatus and process for making composite structures
Assignee: Bayer AG
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Filing: 1957-03-11
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Granted: 1961-07-25
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Expires: 1977-03-11
Abstract
No abstract record available.
Inventors
- 👤 Hoppe Peter
- 👤 Paffrath Hans-Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:45
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/385; B29C44/386; Y; Y10; Y10S; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
AN APPARATUS FOR MAKING SHAPED CELLULAR POLYURETHANE PRODUCTS COMPRISING A MIXING CHAMBER ADAPTED TO MIX LIQUID CHEMICAL COMPONENTS WHICH WILL REACT TO FORM A CELLULAR POLYURETHANE PLASTIC, MEANS FOR CONTINUALLY DELAYING THE FLOW OF THE RESULTING MIXTURE UNTIL REACTION HAS BEGUN AND SOME CARBON DIOXIDE HAS BEEN EVOLVED, SAID MEANS COMPRISING AN OVERFLOW CHAMBER HAVING A TOP AND A BOTTOM, AN OPEN INLET MEANS FOR SAID MIXED LIQUID CHEMICAL COMPONENTS IN THE BOTTOM THEREOF AND AN OPEN OUTLET MEANS FOR THE PARTIALLY REACTED COMPONENTS ADJACENT THE TOP THEREOF, MEANS FOR SHAPING SAID REACTION MIXTURE AND MEANS BETWEEN SAID CHAMBER AND SAID SHAPING MEANS FOR INTRODUCING THE MIXTURE INTO THE LAST SAID MEANS.
Claim 2
Independent Claim
112 words
AN APPARATUS FOR MAKING SHAPED CELLULAR POLYURETHANE PRODUCTS COMPRISING A MIXING CHAMBER ADAPTED TO MIX LIQUID CHEMICAL COMPONENTS WHICH WILL REACT TO FORM A CELLULAR POLYURETHANE PLASTIC, MEANS FOR CONTINUALLY DELAYING THE FLOW OF THE RESULTING MIXTURE UNTIL REACTION HAS BEGUN AND SOME CARBON DIOXIDE HAS BEEN EVOLVED, SAID MEANS COMPRISING AN OVERFLOW CHAMBER HAVING A TOP AND A BOTTOM, AN OPEN INLET MEANS FOR SAID MIXED LIQUID CHEMICAL COMPONENTS IN THE BOTTOM THEREOF AND AN OPEN OUTLET MEANS FOR THE PARTIALLY REACTED COMPONENTS ADJACENT THE TOP THEREOF, MEANS FOR SHAPING SAID REACTION MIXTURE AND MEANS BETWEEN SAID CHAMBER AND SAID SHAPING MEANS FOR INTRODUCING THE MIXTURE INTO THE LAST SAID MEANS.
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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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |