US3021289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyacetalpolyisocyanate polymers
Assignee: Bayer AG
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Filing: 1958-03-17
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Granted: 1962-02-13
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Expires: 1978-03-17
Abstract
No abstract record available.
Inventors
- 👤 Muller Erwin
- 👤 Holtschmidt Hans
- 👤 Braun Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A METHOD OF PREPARING A POLYURETHANE PLASTIC WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF (1) A POLYACETAL AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF A FATTY ACID ESTER HAVING AT LEAST TWO HYDROXYL GROUPS AND AT LEAST TEN CARBON ATOMS AND A CONDENSATE OF AN ALKYLENE OXIDE HAVING FROM TWO TO FIVE CARBON ATOMS AND A FATTY ACID ESTER HAVING AT LEAST TWO HYDROXYL GROUPS AND AT LEAST TEN CARBON ATOMS, SAID POLYACETAL HAVING BEEN PREPARED BY CONDENSATION OF A MONOMERIC ALDEHYDE AND A POLYHYDRIC ALCOHOL HAVING A MOLECULAR WEIGHT OF UP TO ABOUT 400; AND (2) A POLYACETAL WHICH HAS BEEN PREPARED BY REACTING (A) A POLYHYDRIC ALCOHOL HAVING A MOLECULAR WEIGHT OF UP TO ABOUT 400, (B) AS MONOMERIC ALDEHYDE AND (C) A MEMBER SELECTED FROM THE GROUP CONSISTING OF A FATTY ACID ESTER HAVING AT LEAST TWO HYDROXYL GROUPS AND AT LEAST TEN CARBON ATOMS AND A CONDENSATE OFAN ALKYLENE OXIDE HAVING FROM TWO TO FIVE CARBON ATOMS AND A FATTY ACID ESTER HAVING AT LEAST TWO HYDROXYL GROUPS AND AT LEAST TEN CARBON ATOMS.
Claim 2
Independent Claim
188 words
A METHOD OF PREPARING A POLYURETHANE PLASTIC WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF (1) A POLYACETAL AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF A FATTY ACID ESTER HAVING AT LEAST TWO HYDROXYL GROUPS AND AT LEAST TEN CARBON ATOMS AND A CONDENSATE OF AN ALKYLENE OXIDE HAVING FROM TWO TO FIVE CARBON ATOMS AND A FATTY ACID ESTER HAVING AT LEAST TWO HYDROXYL GROUPS AND AT LEAST TEN CARBON ATOMS, SAID POLYACETAL HAVING BEEN PREPARED BY CONDENSATION OF A MONOMERIC ALDEHYDE AND A POLYHYDRIC ALCOHOL HAVING A MOLECULAR WEIGHT OF UP TO ABOUT 400; AND (2) A POLYACETAL WHICH HAS BEEN PREPARED BY REACTING (A) A POLYHYDRIC ALCOHOL HAVING A MOLECULAR WEIGHT OF UP TO ABOUT 400, (B) AS MONOMERIC ALDEHYDE AND (C) A MEMBER SELECTED FROM THE GROUP CONSISTING OF A FATTY ACID ESTER HAVING AT LEAST TWO HYDROXYL GROUPS AND AT LEAST TEN CARBON ATOMS AND A CONDENSATE OFAN ALKYLENE OXIDE HAVING FROM TWO TO FIVE CARBON ATOMS AND A FATTY ACID ESTER HAVING AT LEAST TWO HYDROXYL GROUPS AND AT LEAST TEN CARBON ATOMS.
References Cited (Backward Citations)
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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) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |