US3584045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycloaliphatic di(aminoalkanes)
Assignee: Millennium Petrochemicals Inc
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Filing: 1967-12-28
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Granted: 1971-06-08
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Expires: 1987-12-28
Abstract
Abstract CYCLOALIPHATIC DI(AMINOALKANES) SUCH AS 1-AMINOMETHYL - 1 - (3 - AMINOPROPYL) CYCLOHEXANE; BICYCLO (2.2.1)-2-AMINOMETHYL - 2 - (3-AMINOPROPYL)-HEPTANE; BICYCLO (4.3.0) - 2 - AMINOMETHYL - 2 - (3 - AMINOPROPYL)NONANE PREPARED BY HYDROGENATING THE CORRESPONDING UNSATURATED CYCLOALIPHATIC DINITRILES AND USEFUL FOR THE PREPARATION OF POLYURETHANES BY CONVERSION TO THE CORRESPONDING ALKYL DIISOCYANATES.
Inventors
- 👤 Julian Feldman
- 👤 Orville D Frampton
- 👤 Imre A Keresztes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:53
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/20; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |