Patent US3016323A successfully refreshed from Google Patents.
US3016323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper de-coating and benefaction process and products thereof
Assignee: Butler Paper Corp
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Filing: 1959-03-13
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Granted: 1962-01-09
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Expires: 1979-03-13
Abstract
No abstract record available.
Inventors
- 👤 Norman A Altmann
- 👤 William H Bureau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:24
CPC Classifications
D; D21; D21C; D21C5/00; D21C5/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
THE METHOD OF DE-COATING WATER PAPER HAVING AN INORGANIC BURDEN OF FROM ABOUT 15-40% BY WEIGHT USING COOL OR COLD WATER, THROUGHOUT WITHOUT COOKING OR CHEMICAL SO AS TO RECLAIM AT LEAST ABOUT 45% OF THE FILTER CONTENT AS CLEAN PULP WITH AN ASH CONTENT NOT EXCEEDING ABOUT 3% AND BEING SUITABLE FOR REUSE IN MAKING PAPER OF A QUALITY AT LEAST EQUAL TO THAT OF SAID WASTE PAPER, COMPRISING COARSELY PULPING SUCH WASTE PAPER IN COOL OR COLD WATER, PASSING THE COARSE PULP THROUGH A CONTINOUS ROTARY SCREEN PULP WASHER WHEREIN A MAJOR PORTION OF THE INORGANIC BURDEN IS REMOVED AND THE ASH CONTENT REDUCED TO NOT MORE THAN ABOUT 8%, NEXT WASHING THE PULP ON A SIDE HILL WASHER WHEREBY ITS ASH CONTENT IS REDUCED TO NOT
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) | 1965-01-08 | 1965-07-10 | 1966-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-08 | 1969-07-10 | 1970-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-08 | 1973-07-10 | 1974-01-09 | $7700.00 | Window Closed / Lapsed |