Patent US3014894A successfully refreshed from Google Patents.
US3014894A
Expired / Lapsed
US
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Polyurethane plastics
Assignee: Bayer AG
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Filing: 1957-06-05
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Granted: 1961-12-26
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Expires: 1977-06-05
Abstract
No abstract record available.
Inventors
- 👤 Muller Erwin
- 👤 Bayer Otto
- 👤 Petersen Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:09
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7856; Y; Y10; Y10S; Y10S528/00; Y10S528/903; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A METHOD OF PREPARING A POLYURETHANE PLASTIC WHICH COMPRISES REACTING AN ISOCYANATE HAVING THE FORMULA
Claim 2
Independent Claim
15 words
A METHOD OF PREPARING A POLYURETHANE PLASTIC WHICH COMPRISES REACTING AN ISOCYANATE 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) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |