US3577358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic isocyanate-lignin reaction products and process
Assignee: OI Glass Inc
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Filing: 1967-02-10
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Granted: 1971-05-04
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Expires: 1987-02-10
Abstract
Abstract NEW POLYMERIC MATERIALS, SUCH AS SYNTHETIC RESINS, FOAMED CELLULAR SYNTHETIC RESINS, AND THE LIKE, ARE FORMED BY REACTING AN ORGANIC POLYISOCYANATE WITH LIGNIN, PREFERABLY IN THE PRESENCE OF VARYING AMOUNTS OF CATALYSTS, PLASTICIZERS, EMULSIFIERS, SOLVENTS, AND CO-REACTANTS, DEPENDING UPON THE DESIRED CHARACTERISTICS OF THE FINAL PRODUCT. SUCH PRODUCT HAS REPEATING URETHANE LINKAGES IN THE MOLECULE. PRODUCTS OF THE INVENTION ARE SUITABLE FOR MANY USES, AMONG WHICH USES ARE AS FOAMS, PLASTICS, ADHESIVES, ETC.
Inventors
- 👤 Thomas R Santelli
- 👤 Robert T Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6492; C08G18/30
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |