US3733218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of solder flux with azeotropic solvent mixtures
Assignee: OCCIDENTIAL ELECTROCHEMICALS Corp
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Filing: 1971-11-15
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Granted: 1973-05-15
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Expires: 1991-11-15
Abstract
Abstract AZEOTROPIC MIXTURES OF TRICHLOROETHYLENE/ISOBUTANOL, PERCHLORETHYLLENE/CYCLOPENTANOL, PERCHLORETHYLENE/ETHYLENE GLYCOL MONOETHYL ETHER OR PERCHLORETHYLENE-N-AMYL ALCOHOL ARE USED TO REMOVE THE RESIDUAL ROSIN-BASED SOLDER FLUX FROM SOLDERED PRINTED CIRCUIT BOARDS.
Inventors
- 👤 C Begun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:09
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; C11D7/5086; C23G5/02806
Claims Analysis
Total Claims: 0
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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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |