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Patent US4338256A successfully refreshed from Google Patents.
US4338256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triisocyanates
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1980-05-29
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Granted: 1982-07-06
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Expires: 2000-05-29
Abstract
Abstract The present invention provides novel triisocyanate compounds of the formula: ##STR1## the production thereof and the use thereof for polyurethane resins, especially, for solvent-free or high solids polyurethane coatings.
Inventors
- 👤 Kimiya Fujinami
- 👤 Ichiro Minato
- 👤 Koichi Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:17
CPC Classifications
C; C07; C07C; C07C265/00; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/757; C08G18/76; C08G18/7614; C08G18/7628
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A compound of the formula: ##STR8##
Claim 2
Dependent Claim
6 words
A compound of the formula: ##STR8##
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) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |