Patent US4208487A successfully refreshed from Google Patents.
US4208487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel frother composition for beneficiation of mineral ores
Assignee: Wyeth Holdings LLC
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Filing: 1979-02-15
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Granted: 1980-06-17
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Expires: 1999-02-15
Abstract
Abstract A combination of conventional frothing agent and a particular amino-aldehyde resin provides better recovery of mineral values than can be obtained with either agent alone.
Inventors
- 👤 Samuel S. Wang
- 👤 Eugene L. Smith, Jr.
- 👤 Ernie F. Huliganga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:28
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D1/008; B03D2201/00; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
A composition comprising from about 1 to about 99 weight percent of a frothing agent selected from the group consisting of pine oil, creosote and cresylic acid and, correspondingly, from about 99 to about 1 weight percent of an amino-aldehyde resin comprising the alkylated reaction product of an aldehyde and a material selected from the group consisting of urea, melamine, guanamines, ethylene urea, acetylene diureas, pyrimidines, tetrahydropyrimidines, thiourea carbamates and urethanes.
Claim 2
Dependent Claim
71 words
A composition comprising from about 1 to about 99 weight percent of a frothing agent selected from the group consisting of pine oil, creosote and cresylic acid and, correspondingly, from about 99 to about 1 weight percent of an amino-aldehyde resin comprising the alkylated reaction product of an aldehyde and a material selected from the group consisting of urea, melamine, guanamines, ethylene urea, acetylene diureas, pyrimidines, tetrahydropyrimidines, thiourea carbamates and urethanes.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein from about 20 to 50 weight percent of the amino-aldehyde resin is present.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein said frothing agent is pine oil.
Claim 5
Dependent Claim
12 words
The composition of claim 2 wherein said frothing agent is pine oil.
Claim 6
Dependent Claim
11 words
The composition of claim 4 wherein said amino-aldehyde resin is hexakis(methoxymethyl)melamine.
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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) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |