US2585902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibition of oxidation in tin solutions
Assignee: EIDP Inc
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Filing: 1949-02-02
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Granted: 1952-02-19
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Expires: 1969-02-02
Abstract
No abstract record available.
Inventors
- 👤 Allen G Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:57
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/30; C25D3/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
IN THE OPERATION OF A TIN ELECTROPLATING PROCESS WHEREIN TIN IS ELECTRODEPOSITED FROM AN AQUEOUS, ACIDIC SOLUTION OF STANNOUS CHLORIDE HAVING A PH BETWEEN 2 AND 5 AND CONTAINING 2 TO 12 MOLES OF ALKALI METAL FLUORIDE PER MOLE OF STANNOUS CHLORIDE, THE IMPROVEMENT WHICH CONSISTS IN ADDING THERETO 0.1 TO 5 GRAMS PER LITER OF THIOUREA.
Claim 2
Dependent Claim
57 words
IN THE OPERATION OF A TIN ELECTROPLATING PROCESS WHEREIN TIN IS ELECTRODEPOSITED FROM AN AQUEOUS, ACIDIC SOLUTION OF STANNOUS CHLORIDE HAVING A PH BETWEEN 2 AND 5 AND CONTAINING 2 TO 12 MOLES OF ALKALI METAL FLUORIDE PER MOLE OF STANNOUS CHLORIDE, THE IMPROVEMENT WHICH CONSISTS IN ADDING THERETO 0.1 TO 5 GRAMS PER LITER OF THIOUREA.
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) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |