US3554974A
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US
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Elastomeric linear polyurethane filament formed with chain extension agent comprising dialkylene-triamine/aldehyde reaction product
Assignee: HENRI A MOMMAERTS
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Filing: 1968-03-04
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Granted: 1971-01-12
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Expires: 1988-03-04
Abstract
Abstract THE PRESENT INVENTION IS CONCERNED WITH NEW, LINEAR POLYMERIC URETHANES OF THE ELASTOMERIC TYPE WITH AN IMPROVED DYESTUFF AFFINITY AND IS ALSO CONCERNED WITH THE PRODUCTION THEREOF.
Inventors
- 👤 Henri A Mommaerts
- 👤 Wilfried J Melaerts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:29
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/906
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 |