Patent US2846408A successfully refreshed from Google Patents.
US2846408A
Expired / Lapsed
US
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Cellular polyurethane plastics of improved pore structure and process for preparing same
Assignee: Bayer AG
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Filing: 1955-01-18
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Granted: 1958-08-05
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Expires: 1975-01-18
Abstract
No abstract record available.
Inventors
- 👤 Brochhagen Franzkarl
- 👤 Koln Bezirk
- 👤 Schmidt Fritz
- 👤 Hoppe Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:21
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR PREPARING A CELLULAR PLASTIC WITH AN IMPROVED CELLULAR STRUCTURE FROM A COMPOSITION COMPRISING WATER, AN ORGANIC POLYISOCYANATE AND A POLYESTER PREPARED BY REACTING A DICARBOXYLIC ACID AND AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF TRIHYDRIC ALCOHOL AND A GLYCOL WHICH COMPRISES ADDING TO THE COMPOSITION FROM ABOUT 0.01 PERCENT TO ABOUT 5 PERCENT BASED ON THE WEIGHT OF THE POLYESTER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SOAPS AND ALCOHOLATES OF METALS HAVING THE FORMULA
Claim 2
Dependent Claim
81 words
A PROCESS FOR PREPARING A CELLULAR PLASTIC WITH AN IMPROVED CELLULAR STRUCTURE FROM A COMPOSITION COMPRISING WATER, AN ORGANIC POLYISOCYANATE AND A POLYESTER PREPARED BY REACTING A DICARBOXYLIC ACID AND AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF TRIHYDRIC ALCOHOL AND A GLYCOL WHICH COMPRISES ADDING TO THE COMPOSITION FROM ABOUT 0.01 PERCENT TO ABOUT 5 PERCENT BASED ON THE WEIGHT OF THE POLYESTER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SOAPS AND ALCOHOLATES OF METALS HAVING THE FORMULA
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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |