US2680073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sizing paper
Assignee: Honeywell International Inc
•
Filing: 1951-01-10
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Granted: 1954-06-01
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Expires: 1971-01-10
Abstract
No abstract record available.
Inventors
- 👤 John B Davidson
- 👤 Santelli Thomas Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:41
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE METHOD OF SIZING PAPER THAT COMPRISES TREATING AN AQUEOUS PULP SUSPENSION BY STEPS IN THE FOLLOWING ORDER: (1) ADDING A WATER-SOLUBLE ALUMINUM COMPOUND TO SAID SUSPENSION, (2) ADDING AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SALT OF AN ORGANOSILICIC ACID AND A METAL SELECTED FROM THE CLASS CONSISTING OF ALKALI METALS AND ALKALINE EARTH METALS, AND (3) PREPARING PAPER FROM SAID SUSPENSION, SAID ALUMINUM SALT BEING PRESENT IN AMOUNT SUFFICIENT TO NEUTRALIZE THE ORGANOSILICIC ACID SALT AND TO COMPLETELY PRECIPITATE AND FIX THE ORGANOSILICIC ACID GENERATED THEREBY ON THE PULP FIBERS AND SAID ORGANOSILIC ACID HAVING AN AVERAGE OF 0.05 TO 3 ORGANIC GROUPS CONTAINING FROM 1 TO 12 CARBON ATOMS ATTACHED TO EACH SILICON ATOM BY CARBON-SILICON BONDS.
Claim 2
Independent Claim
119 words
THE METHOD OF SIZING PAPER THAT COMPRISES TREATING AN AQUEOUS PULP SUSPENSION BY STEPS IN THE FOLLOWING ORDER: (1) ADDING A WATER-SOLUBLE ALUMINUM COMPOUND TO SAID SUSPENSION, (2) ADDING AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SALT OF AN ORGANOSILICIC ACID AND A METAL SELECTED FROM THE CLASS CONSISTING OF ALKALI METALS AND ALKALINE EARTH METALS, AND (3) PREPARING PAPER FROM SAID SUSPENSION, SAID ALUMINUM SALT BEING PRESENT IN AMOUNT SUFFICIENT TO NEUTRALIZE THE ORGANOSILICIC ACID SALT AND TO COMPLETELY PRECIPITATE AND FIX THE ORGANOSILICIC ACID GENERATED THEREBY ON THE PULP FIBERS AND SAID ORGANOSILIC ACID HAVING AN AVERAGE OF 0.05 TO 3 ORGANIC GROUPS CONTAINING FROM 1 TO 12 CARBON ATOMS ATTACHED TO EACH SILICON ATOM BY CARBON-SILICON BONDS.
References Cited (Backward Citations)
US2528554A
Cited
US2507200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |