US3969394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes
Assignee: Celanese Corp
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Filing: 1974-09-16
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Granted: 1976-07-13
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Expires: 1994-09-16
Abstract
Abstract Novel polyisocyanates are provided, and thermoplastic polyurethane resins are produced therefrom which are suitable as substrates for film, fiber and foam products.
Inventors
- 👤 Arthur M. Reader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:21
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8012; C07; C07C; C07C67/00; C07C67/24; C07C67/26; C08G18/28; C08G18/30; C08G18/34; C08G18/67; C08G18/675; C08G18/6755
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
48 words
A polyisocyanate compound corresponding to the formula: ##SPC2## wherein R is a polyvalent organic radical containing between 2 and 22 carbon atoms selected from the group consisting of aliphatic, cycloaliphatic and aromatic radicals; and m is a positive integer having a value of from 1 to about 5.
Claim 2
Dependent Claim
48 words
A polyisocyanate compound corresponding to the formula: ##SPC2## wherein R is a polyvalent organic radical containing between 2 and 22 carbon atoms selected from the group consisting of aliphatic, cycloaliphatic and aromatic radicals; and m is a positive integer having a value of from 1 to about 5.
Claim 3
Dependent Claim
8 words
A polyisocyanate compound corresponding to the formula: ##SPC3##
Claim 4
Dependent Claim
8 words
A polyisocyanate compound corresponding to the formula: ##SPC3##
Claim 5
Dependent Claim
8 words
A polyisocyanate compound corresponding to the formula: ##SPC4##
Claim 6
Dependent Claim
8 words
A polyisocyanate compound corresponding to the formula: ##SPC4##
References Cited (Backward Citations)
US3872057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |