US2845397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of co-coagulating resin treated lignin and a rubber latex and product obtained thereby
Assignee: Uniroyal Inc
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Filing: 1956-04-17
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Granted: 1958-07-29
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Expires: 1976-04-17
Abstract
No abstract record available.
Inventors
- 👤 George S Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:47
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08L9/08; C08L21/00; C08L61/00; C08L61/20; C08L61/22; C08L61/24; C08L97/00; C08L97/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE METHOD WHICH COMPRISES MIXING WITH A RUBBER LATEX AN ALKALINE SOLUTION OF LIGNIN THAT HAS BEEN TREATED WITH MATERIAL SELECTED FROM THE GROUP CONSISTING OF UREA AND FORMALDEHYDE, THIOUREA AND FORMALDEHYDE, DITHIOBIURET AND FORMALDEHYDE, AND DIALKYLTHIOUREA AND FORMALDEHYDE, THE UREA-TYPE ADDITIVE BEING IN AMOUNT FROM 2 TO 20% BASED ON THE DRY WEIGHT OF THE LIGNIN AND THE FORMALDEHYDE BEING IN AMOUNT FROM 0.5 TO 5 MOLES PER MOLE OF UREA-TYPE ADDITIVE, AND THE RATIO OF LIGNIN TO RUBBER BEING IN THE RANGE OF 25 TO 100 PARTS OF LIGNIN TO 100 PARTS OF RUBBER, AND CO-COAGULATING THE RUBBER AND TREATED LIGNIN IN SUCH MIXTURE.
Claim 2
Independent Claim
106 words
THE METHOD WHICH COMPRISES MIXING WITH A RUBBER LATEX AN ALKALINE SOLUTION OF LIGNIN THAT HAS BEEN TREATED WITH MATERIAL SELECTED FROM THE GROUP CONSISTING OF UREA AND FORMALDEHYDE, THIOUREA AND FORMALDEHYDE, DITHIOBIURET AND FORMALDEHYDE, AND DIALKYLTHIOUREA AND FORMALDEHYDE, THE UREA-TYPE ADDITIVE BEING IN AMOUNT FROM 2 TO 20% BASED ON THE DRY WEIGHT OF THE LIGNIN AND THE FORMALDEHYDE BEING IN AMOUNT FROM 0.5 TO 5 MOLES PER MOLE OF UREA-TYPE ADDITIVE, AND THE RATIO OF LIGNIN TO RUBBER BEING IN THE RANGE OF 25 TO 100 PARTS OF LIGNIN TO 100 PARTS OF RUBBER, AND CO-COAGULATING THE RUBBER AND TREATED LIGNIN IN SUCH MIXTURE.
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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |