US2563856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defoaming agent for pulp and paper stock
Assignee: Nopco Chemical Co
•
Filing: 1945-10-12
•
Granted: 1951-08-14
•
Expires: 1965-10-12
Abstract
No abstract record available.
Inventors
- 👤 Earl P Mcginn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:56
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/06; D21H21/12; D21H17/00; D21H17/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A DEFOAMING AGENT FOR PULP AND PAPER STOCK COMPRISING A WATER EMULSION MADE UP OF FROM ABOUT 10 PARTS TO ABOUT 20 PARTS BY WEIGHT OF A MINERAL WAX, FROM ABOUT 4 PARTS TO ABOUT 7 PARTS BY WEIGHT OF AN ALKALI METAL SOAP OF RICINOLEIC ACID SELECTED FROM THE GROUP CONSISTING OF THE SODIUM SOAP AND THE POTASSIUM SOAP OF RICINOLEIC ACID, AND FROM ABOUT 5 PARTS TO ABOUT 20 PARTS BY WEIGHT OF A MONO ESTER OF A POLYHYDRIC ALCOHOL AND A FATTY ACID HAVING FROM 16 TO 22 CARBON ATOMS, THE BALANCE OF THE EMULSION BEING SUBSTANTIALY ALL WATER AND THE AMOUNT OF WATER IN THE EMULSION NOT EXCEEDING ABOUT 99% OF THE EMULSION.
Claim 2
Dependent Claim
117 words
A DEFOAMING AGENT FOR PULP AND PAPER STOCK COMPRISING A WATER EMULSION MADE UP OF FROM ABOUT 10 PARTS TO ABOUT 20 PARTS BY WEIGHT OF A MINERAL WAX, FROM ABOUT 4 PARTS TO ABOUT 7 PARTS BY WEIGHT OF AN ALKALI METAL SOAP OF RICINOLEIC ACID SELECTED FROM THE GROUP CONSISTING OF THE SODIUM SOAP AND THE POTASSIUM SOAP OF RICINOLEIC ACID, AND FROM ABOUT 5 PARTS TO ABOUT 20 PARTS BY WEIGHT OF A MONO ESTER OF A POLYHYDRIC ALCOHOL AND A FATTY ACID HAVING FROM 16 TO 22 CARBON ATOMS, THE BALANCE OF THE EMULSION BEING SUBSTANTIALY ALL WATER AND THE AMOUNT OF WATER IN THE EMULSION NOT EXCEEDING ABOUT 99% OF THE EMULSION.
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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) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |