US2600361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of foaming in steam generation
Assignee: Dearborn Chemical Co
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Filing: 1948-06-09
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Granted: 1952-06-10
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Expires: 1968-06-09
Abstract
No abstract record available.
Inventors
- 👤 Lewis O Gunderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:05
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF INHIBITING FOAMING IN AN AQUEOUS SYSTEM HAVING A TENDENCY TO FOAM, WHICH COMPRISES DISPERSING INTO SAID AQUEOUS SYSTEM A SUBSTANCE CONSISTING ESSENTIALLY OF A POLYETHYLENE POLYAMINE ACYLATED IN BOTH ITS PRIMARY AMINO GROUPS WITH A CARBOXYLIC ACID CONTAINING AT LEAST 12 CARBON ATOMS AND ALSO ACYLATED IN AT LEAST ONE SECONDARY AMINO GROUP WITH A CARBOXYLIC ACID CONTAINING FROM 2 TO 10 CARBON ATOMS, SAID SUBSTANCE BEING DISPERSED IN SAID AQUEOUS SYSTEM IN AN AMOUNT SUFFICIENT SUBSTANTIALLY TO INHIBIT THE TENDENCY OF SAID AQUEOUS SYSTEM TO FOAM.
Claim 2
Independent Claim
90 words
THE METHOD OF INHIBITING FOAMING IN AN AQUEOUS SYSTEM HAVING A TENDENCY TO FOAM, WHICH COMPRISES DISPERSING INTO SAID AQUEOUS SYSTEM A SUBSTANCE CONSISTING ESSENTIALLY OF A POLYETHYLENE POLYAMINE ACYLATED IN BOTH ITS PRIMARY AMINO GROUPS WITH A CARBOXYLIC ACID CONTAINING AT LEAST 12 CARBON ATOMS AND ALSO ACYLATED IN AT LEAST ONE SECONDARY AMINO GROUP WITH A CARBOXYLIC ACID CONTAINING FROM 2 TO 10 CARBON ATOMS, SAID SUBSTANCE BEING DISPERSED IN SAID AQUEOUS SYSTEM IN AN AMOUNT SUFFICIENT SUBSTANTIALLY TO INHIBIT THE TENDENCY OF SAID AQUEOUS SYSTEM TO FOAM.
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) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |