Patent US3158530A successfully refreshed from Google Patents.
US3158530A
Expired / Lapsed
US
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Process for making usable waste paper containing bitumens
Assignee: Lowe Paper Co
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Filing: 1961-10-16
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Granted: 1964-11-24
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Expires: 1981-10-16
Abstract
No abstract record available.
Inventors
- 👤 Charles O Anastasio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:05
CPC Classifications
D; D21; D21C; D21C5/00; D21C5/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS FOR MAKING WASTE PAPER, WHICH CONTAINS BITUMINOUS CONTAMINANTS, USABLE BY CHEMICAL TREATMENT, COMPRISING THE STEPS OF: (A) DISSOLVING THE CONTAMINANTS FROM SAID WASTE PAPER WITH AN ALIPHATIC HYDROCARBON; (B) ADDING AN ALKALI METAL HYDROXIDE AS A STABILIZER TO THE SOLUTION OF CONTAMINANTS, IN AN AMOUNT TO RESULT IN A PH RANGE OF ABOUT 8.5 TO ABOUT 9.5; WHILE MAINTAINIING THE TEMPERATURE IN STEPS (A) AND (B) BELOW THE BOILING POINT OF SAID HYDROCARBON; AND (C) HEATING THE HYDROCARBON SOLUTION TO APPROXIMATELY 200*F., EVAPORATING SUFFICIENT SOLVENT TO CAUSE THE CONTAMINANTS TO BECOME DEPOSITED AS MICROSCOPIC PARTICLES IN DISPERSION IN THE WASTE PAPER.
Claim 2
Dependent Claim
103 words
A PROCESS FOR MAKING WASTE PAPER, WHICH CONTAINS BITUMINOUS CONTAMINANTS, USABLE BY CHEMICAL TREATMENT, COMPRISING THE STEPS OF: (A) DISSOLVING THE CONTAMINANTS FROM SAID WASTE PAPER WITH AN ALIPHATIC HYDROCARBON; (B) ADDING AN ALKALI METAL HYDROXIDE AS A STABILIZER TO THE SOLUTION OF CONTAMINANTS, IN AN AMOUNT TO RESULT IN A PH RANGE OF ABOUT 8.5 TO ABOUT 9.5; WHILE MAINTAINIING THE TEMPERATURE IN STEPS (A) AND (B) BELOW THE BOILING POINT OF SAID HYDROCARBON; AND (C) HEATING THE HYDROCARBON SOLUTION TO APPROXIMATELY 200*F., EVAPORATING SUFFICIENT SOLVENT TO CAUSE THE CONTAMINANTS TO BECOME DEPOSITED AS MICROSCOPIC PARTICLES IN DISPERSION IN THE WASTE PAPER.
References Cited (Backward Citations)
CA469990A
Cited
US1351092A
Cited
US1707604A
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US1990376A
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US2236900A
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US2607678A
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US2712994A
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US2721504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |