Patent US2699998A successfully refreshed from Google Patents.
US2699998A
Expired / Lapsed
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Method of treating waste sulfite liquors
Assignee: Penobscot Chemical Fibre Co
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Filing: 1948-01-07
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Granted: 1955-01-18
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Expires: 1968-01-07
Abstract
No abstract record available.
Inventors
- 👤 Avery A Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:45
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
METHOD OF TREATING CALCIUM SULFITE LIQUORS FROM PULP AND PAPER MANUFACTURE COMPRISING THE PRELIMINARY STEP OF ADDING A WATER-SOLUBLE ALIPHATIC ALCOHOL, IN WHICH THE SOLID COMPONENTS OF THE SULFITE LIQUOR ARE OF LOW SOLUBILITY, TO THE SULFITE LIQUOR, WHICH IS OF SUBSTANTIALLY THE SAME COMPOSITION AND CONDITION IN WHICH THE LATTER COMES FROM THE PULP TREATED THEREWITH, WHEREBY A PORTION OF THE CALCIUM SALTS CONTAINED THEREIN ARE SEGREGATED AND THEREUPON ADDING AN ALIPHATIC ALCOHOL CONTAINING THREE OR MORE CARBON ATOMS IN ITS MOLECULAR STRUCTURE, WHEREBY THE THUS TREATED CHARGE IS SEGREGATED INTO AN AQUEOUS ALCOHOL FRACTION AND AN AQUEOUS SOLIDS FRACTION, THE LATTER CONTAINING THE GREATER PART OF THE SOLID AND WATER-SOLUBLE MATTER OF THE ORIGINAL SULFITE LIQUOR.
Claim 2
Dependent Claim
118 words
METHOD OF TREATING CALCIUM SULFITE LIQUORS FROM PULP AND PAPER MANUFACTURE COMPRISING THE PRELIMINARY STEP OF ADDING A WATER-SOLUBLE ALIPHATIC ALCOHOL, IN WHICH THE SOLID COMPONENTS OF THE SULFITE LIQUOR ARE OF LOW SOLUBILITY, TO THE SULFITE LIQUOR, WHICH IS OF SUBSTANTIALLY THE SAME COMPOSITION AND CONDITION IN WHICH THE LATTER COMES FROM THE PULP TREATED THEREWITH, WHEREBY A PORTION OF THE CALCIUM SALTS CONTAINED THEREIN ARE SEGREGATED AND THEREUPON ADDING AN ALIPHATIC ALCOHOL CONTAINING THREE OR MORE CARBON ATOMS IN ITS MOLECULAR STRUCTURE, WHEREBY THE THUS TREATED CHARGE IS SEGREGATED INTO AN AQUEOUS ALCOHOL FRACTION AND AN AQUEOUS SOLIDS FRACTION, THE LATTER CONTAINING THE GREATER PART OF THE SOLID AND WATER-SOLUBLE MATTER OF THE ORIGINAL SULFITE LIQUOR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |