US4068086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blocked polyisocyanates obtained from 2,2,4-trimethylhexamethylene-diisocyanate and acetoacetic acid alkyl esters
Assignee: Hoechst AG
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Filing: 1976-03-24
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Granted: 1978-01-10
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Expires: 1996-03-24
Abstract
Abstract The subject of the invention are completely or partially blocked diisocyanates of the following formula (III) <IMAGE> (III) wherein R1 denotes the radical <IMAGE> or NCO and R denotes the methyl, ethyl, propyl, iso-propyl, n-butyl, tert.-butyl, iso-butyl, sec.-butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl and dodecyl radical.
Inventors
- 👤 Horst Dalibor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/73; C07; C07C; C07C265/00; C07C265/02; C07C265/04; C08G18/80; C08G18/8061; C08G18/8093; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
42 words
A compound of the formula ##STR15##wherein R 1 denotes -NCO or the radical ##STR16##and each R denotes a radical selected from the group consisting of methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, isobutyl, sec-butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, and dodecyl radical.
Claim 2
Dependent Claim
42 words
A compound of the formula ##STR15##wherein R 1 denotes -NCO or the radical ##STR16##and each R denotes a radical selected from the group consisting of methyl, ethyl, propyl, isopropyl, n-butyl, tert-butyl, isobutyl, sec-butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, and dodecyl radical.
Claim 3
Dependent Claim
15 words
A compound according to claim 1, wherein R 1 denotes -NCO and R is tert-butyl.
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) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |