US2715614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defoaming agent for pulp and paper stock
Assignee: Nopco Chemical Co
•
Filing: 1949-03-31
•
Granted: 1955-08-16
•
Expires: 1969-03-31
Abstract
No abstract record available.
Inventors
- 👤 Clark E Snook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:02
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/06; D21H21/12; D21H17/00; D21H17/03; D21H17/04; D21H17/05; D21H17/06; D21H17/20; D21H17/33; D21H17/46; D21H17/53; D21H17/60; D21H17/63; D21H17/66; D21H17/71; Y; Y10; Y10S; Y10S159/00; Y10S159/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A DEFOAMING AGENT FOR PULP AND PAPER STOCK CONSISTING ESSENTIALLY OF AN AQUEOUS EMULSION MADE UP OF FROM ABOUT 3 PARTS TO ABOUT 15 PARTS OF A PARAFFIN HYDROCARBON CONTAINING AT LEAST 12 CARBON ATOMS, FROM ABOUT 3 PARTS TO ABOUT 15 PARTS OF A PARTIAL ESTER OF A POLYHYDRIC ALCOHOL AND A FATTY ACID HAVING FROM 14 TO 22 CARBON ATOMS, FROM ABOUT 3 PARTS TO ABOUT 15 PARTS OF A FATTY ACID ESTER OF A MONOHYDRIC ALCOHOL CONTAINING NOT MORE THAN 8 CARBON ATOMS AND A FATTY ACID CONTAINING FROM 14 TO 22 CARBON ATOMS, FROM ABOUT 3 PARTS TO ABOUT 15 PARTS OF AN ESTER OF A POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF FROM ABOUT 200 TO ABOUT 4000 AND A FATTY ACID CONTAINING FROM 14 TO 22 CARBON ATOMS, AND WATER WITH THE AMOUNT OF WATER IN THE EMULSION NOT EXCEEDING ABOUT 99.98% OF THE EMULSION.
Claim 2
Dependent Claim
151 words
A DEFOAMING AGENT FOR PULP AND PAPER STOCK CONSISTING ESSENTIALLY OF AN AQUEOUS EMULSION MADE UP OF FROM ABOUT 3 PARTS TO ABOUT 15 PARTS OF A PARAFFIN HYDROCARBON CONTAINING AT LEAST 12 CARBON ATOMS, FROM ABOUT 3 PARTS TO ABOUT 15 PARTS OF A PARTIAL ESTER OF A POLYHYDRIC ALCOHOL AND A FATTY ACID HAVING FROM 14 TO 22 CARBON ATOMS, FROM ABOUT 3 PARTS TO ABOUT 15 PARTS OF A FATTY ACID ESTER OF A MONOHYDRIC ALCOHOL CONTAINING NOT MORE THAN 8 CARBON ATOMS AND A FATTY ACID CONTAINING FROM 14 TO 22 CARBON ATOMS, FROM ABOUT 3 PARTS TO ABOUT 15 PARTS OF AN ESTER OF A POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF FROM ABOUT 200 TO ABOUT 4000 AND A FATTY ACID CONTAINING FROM 14 TO 22 CARBON ATOMS, AND WATER WITH THE AMOUNT OF WATER IN THE EMULSION NOT EXCEEDING ABOUT 99.98% OF THE EMULSION.
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) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |