US3554951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester polyurethane lacquers from mixed phthalic acids
Assignee: Bayer AG
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Filing: 1969-03-26
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Granted: 1971-01-12
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Expires: 1989-03-26
Abstract
Abstract POLYURETHANE LACQUER COMPOSITION WHICH COMPRISES A SOLVENT SOLUTION OF A POLYMER PREPARED BY REACTING AN ALIPHATIC POLYISOCYANATE WITH AN HYDROXYL POLYESTER OF AN EXCESS OF A POLYHYDRIC ALCOHOL WITH A MIXTURE OF PHTHALIC ACID AND HEXAHYDROPHTHALIC ACID.
Inventors
- 👤 Friedrich Blomeyer
- 👤 Wilhelm Bunge
- 👤 Gerhard Mennicken
- 👤 Reinhard Hebermehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:35
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/123; C08G63/137; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/423; C08G18/70; C08G18/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |