Patent US2844548A successfully refreshed from Google Patents.
US2844548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the incorporation of lignin into synthetic rubber
Assignee: Uniroyal Inc
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Filing: 1954-07-28
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Granted: 1958-07-22
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Expires: 1974-07-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry E Haxo
- 👤 George S Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:43
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08L9/08; C08L21/00; C08L2310/00; C08L97/00; C08L97/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
THE METHOD OF PREPARING SYNETHETIC RUBBER IN ADMIXTURE WITH 25 TO 75 PARTS OF LIGNIN PER 100 PARTS OF SYNTHETIC RUBBER WHICH COMPRISES MIXING AN AMOUNT OF SYNTHETIC RUBBER LATEX CONTAINING 25% TO 75% OF SAID 100 PARTS OF SYNTHETIC RUBBER WITH AN AQUEOUS ALKALI SOLUTION CONTAINING SUBSTANTIALLY ALL SAID 25 TO 75 PARTS OF LIGNIN ADDING AN AMOUNT OF ACID TO THE MIXTURE TO CO-PRECIPITATE THE SYNTHETIC RUBBER AND LIGNIN IN THE MIXTURE AND TO PROVIDE EXCESS ACID TO COAGULATE THE REMAINING SYNTHETIC RUBBER WHEN ADDED IN LATEX FORM TO THIS FIRST CO-PRECIPITATE, MIXING SYNTHETIC RUBBER LATEX CONTAINING THE REMAINING 75% TO 25% OF SAID 100 PARTS OF SYNTHETIC RUBBER WITH THE 75% TO 25% OF SAID 100 PARTS OF SYNTHETIC RUBBER WITH ADDED LATEX IS COAGULATED IN THE PRESENCE OF SAID FIRST COPRECIPITATE BY SAID EXCESS ACID, AND FILTERING THE THUS FORMED MIXED COAGULUM, SAID SYNTHETIC RUBBER LATEX BEING AN AQUEOUS EMULSION POLYMERIZATE OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF BUTADIENES-1,3 AND MIXTURES OF BUTADIENES-1,3 WITH COMPOUNDS CONTAINING A SINGLE CH2=C< GROUP WHICH ARE COPOLYMERIZABLE WITH BUTADIENES-1,3.
Claim 2
Independent Claim
180 words
THE METHOD OF PREPARING SYNETHETIC RUBBER IN ADMIXTURE WITH 25 TO 75 PARTS OF LIGNIN PER 100 PARTS OF SYNTHETIC RUBBER WHICH COMPRISES MIXING AN AMOUNT OF SYNTHETIC RUBBER LATEX CONTAINING 25% TO 75% OF SAID 100 PARTS OF SYNTHETIC RUBBER WITH AN AQUEOUS ALKALI SOLUTION CONTAINING SUBSTANTIALLY ALL SAID 25 TO 75 PARTS OF LIGNIN ADDING AN AMOUNT OF ACID TO THE MIXTURE TO CO-PRECIPITATE THE SYNTHETIC RUBBER AND LIGNIN IN THE MIXTURE AND TO PROVIDE EXCESS ACID TO COAGULATE THE REMAINING SYNTHETIC RUBBER WHEN ADDED IN LATEX FORM TO THIS FIRST CO-PRECIPITATE, MIXING SYNTHETIC RUBBER LATEX CONTAINING THE REMAINING 75% TO 25% OF SAID 100 PARTS OF SYNTHETIC RUBBER WITH THE 75% TO 25% OF SAID 100 PARTS OF SYNTHETIC RUBBER WITH ADDED LATEX IS COAGULATED IN THE PRESENCE OF SAID FIRST COPRECIPITATE BY SAID EXCESS ACID, AND FILTERING THE THUS FORMED MIXED COAGULUM, SAID SYNTHETIC RUBBER LATEX BEING AN AQUEOUS EMULSION POLYMERIZATE OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF BUTADIENES-1,3 AND MIXTURES OF BUTADIENES-1,3 WITH COMPOUNDS CONTAINING A SINGLE CH2=C< GROUP WHICH ARE COPOLYMERIZABLE WITH BUTADIENES-1,3.
References Cited (Backward Citations)
US2608537A
Cited
US2769789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |