Patent US3733710A successfully refreshed from Google Patents.
US3733710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for drying metal parts
Assignee: Detrex Corp
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Filing: 1971-07-13
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Granted: 1973-05-22
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Expires: 1991-07-13
Abstract
Abstract A method for removing water from metal parts, wherein the parts are introduced into a bath of a solvent which displaces the water from the parts, the parts then being conveyed upward on a spiral conveyor through saturated vapors of the solvent. The articles are then conveyed out of the vapor zone and are heated to completely dry them of all traces of the solvent.
Inventors
- 👤 T Kearney
- 👤 G Bieber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:03
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/04; F; F26; F26B; F26B15/00; F26B15/26; F26B17/00; F26B17/26; F26B17/266; F26B5/00; F26B5/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
175 words
A method for treating metal articles covered at least partially with a thin film of water, comprising: a. immersing said articles in a bath of water-immiscible halogenated solvent having a specific gravity greater than that of water such that said solvent displaces the water from said articles; b. maintaining said solvent bath in a heated state below its boiling temperature, and continuously introducing solvent into said bath and overflowing water and solvent from said bath; c. maintaining a vapor zone containing vapor of the same type of solvent as maintained in said bath said vapor being generated in a separate chamber containing substantially water-free solvent; d. vibrating said articles out of said solvent bath and through said vapor zone; e. back-washing said articles with the same type of solvent as maintained in said bath while said articles are being vibrated through a portion of said vapor zone; and f. heating said articles after said back-washing to a temperature above the boiling point of said solvent to ensure complete evaporation of said solvent from said articles.
Claim 2
Independent Claim
175 words
A method for treating metal articles covered at least partially with a thin film of water, comprising: a. immersing said articles in a bath of water-immiscible halogenated solvent having a specific gravity greater than that of water such that said solvent displaces the water from said articles; b. maintaining said solvent bath in a heated state below its boiling temperature, and continuously introducing solvent into said bath and overflowing water and solvent from said bath; c. maintaining a vapor zone containing vapor of the same type of solvent as maintained in said bath said vapor being generated in a separate chamber containing substantially water-free solvent; d. vibrating said articles out of said solvent bath and through said vapor zone; e. back-washing said articles with the same type of solvent as maintained in said bath while said articles are being vibrated through a portion of said vapor zone; and f. heating said articles after said back-washing to a temperature above the boiling point of said solvent to ensure complete evaporation of said solvent from said articles.
Claim 3
Dependent Claim
28 words
The method as described in claim 1, wherein the solvent is perchloroethylene, and said solvent bath is maintained at a temperature in the range of 180*F to 220*F.
Claim 4
Dependent Claim
49 words
The method as described in claim 1, wherein said articles are heated to a temperature above the boiling point of said solvent both while said articles are being vibrated through the upper portion of said vapor zone and also after said articles have been vibrated through said vapor zone.
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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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |