Patent US2530984A successfully refreshed from Google Patents.
US2530984A
Expired / Lapsed
US
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Process for impregnating carbon brushes
Assignee: Westinghouse Electric Corp
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Filing: 1949-09-29
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Granted: 1950-11-21
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Expires: 1969-09-29
Abstract
No abstract record available.
Inventors
- 👤 Lawrence E Moberly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:22
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5007; C04B41/5011; C04B41/80; C04B41/81; C04B41/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN THE PROCESS OF TREATING CARBON BRUSHES, THE STEPS OF IMPREGNATING THE CARBON BRUSH WITH SUBSTANTIAL AMOUNTS OF A CONCENTRATED SOLUTION OF BARIUM ACETATE, HEATING THE CARBON BRUSH AND CONTAINED SOLUTION TO A TEMPERATURE OF THE ORDER OF 500*C. FOR A PERIOD OF TIME SUFFICIENT TO DECOMPOSE SUBSTANTIALLY COMPLETELY THE BARIUM ACETATE AND THEREBVY DEPOSIT SOLID BARIUM OXIDE AND BARIUM CARBONATE WITHIN THE PORES OF THE CARBON BRUSH AND DRIVE OFF VOLATILE COMPONENTS, AND SUBJECTING THE BRUSH AND THE BARIUM OXIDE AND BARIUM CARBONATE CONTAINED THEREIN TO A HALOGEN ACID SELECTED FROM THE GROUP CONSISTING OF HYDROFLUORIC ACID AND HYDROIODIC ACID FOR A PERIOD OF TIME SUFFICIENT TO SUBSTANTIALLY COMPLETELY CHANGE THE DESPOSITED BARIUM OXIDE AND BARIUM CARBONATE TO A HALOGENATED BARIUM COMPOUND.
Claim 2
Dependent Claim
123 words
IN THE PROCESS OF TREATING CARBON BRUSHES, THE STEPS OF IMPREGNATING THE CARBON BRUSH WITH SUBSTANTIAL AMOUNTS OF A CONCENTRATED SOLUTION OF BARIUM ACETATE, HEATING THE CARBON BRUSH AND CONTAINED SOLUTION TO A TEMPERATURE OF THE ORDER OF 500*C. FOR A PERIOD OF TIME SUFFICIENT TO DECOMPOSE SUBSTANTIALLY COMPLETELY THE BARIUM ACETATE AND THEREBVY DEPOSIT SOLID BARIUM OXIDE AND BARIUM CARBONATE WITHIN THE PORES OF THE CARBON BRUSH AND DRIVE OFF VOLATILE COMPONENTS, AND SUBJECTING THE BRUSH AND THE BARIUM OXIDE AND BARIUM CARBONATE CONTAINED THEREIN TO A HALOGEN ACID SELECTED FROM THE GROUP CONSISTING OF HYDROFLUORIC ACID AND HYDROIODIC ACID FOR A PERIOD OF TIME SUFFICIENT TO SUBSTANTIALLY COMPLETELY CHANGE THE DESPOSITED BARIUM OXIDE AND BARIUM CARBONATE TO A HALOGENATED BARIUM COMPOUND.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |