Patent US3267049A successfully refreshed from Google Patents.
US3267049A
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US
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Phosphorus polyurethane plastic prepared from a hydroxyl phosphorus compound
Assignee: Bayer AG
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Filing: 1962-05-07
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Granted: 1966-08-16
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Expires: 1982-05-07
Abstract
No abstract record available.
Inventors
- 👤 Holtschmidt Hans
- 👤 Braun Gunther
- 👤 Merten Rudolf
- 👤 Nischk Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:30
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/12; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/40; C08G18/48; C08G18/50; C08G18/5075; C08G18/5081; C08G18/5084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A POLYURETHANE PLASTIC PREPARED BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH AN HYDROXYL PHOSPHORUS COMPOUND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 600 TO ABOUT 10,000 AND AN HYDROXYL NUMBER OF ABOUT 40 TO ABOUT 500 WHICH IS PREPARED BY A PROCESS WHICH COMPRISES REACTING A POLYHYDRIC ALCOHOL WITH A PHOSPHORIC ACID ESTER HAVING THE FORMULA
Claim 2
Dependent Claim
59 words
A POLYURETHANE PLASTIC PREPARED BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH AN HYDROXYL PHOSPHORUS COMPOUND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 600 TO ABOUT 10,000 AND AN HYDROXYL NUMBER OF ABOUT 40 TO ABOUT 500 WHICH IS PREPARED BY A PROCESS WHICH COMPRISES REACTING A POLYHYDRIC ALCOHOL WITH A PHOSPHORIC ACID ESTER HAVING THE FORMULA
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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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |