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Patent US2721836A successfully refreshed from Google Patents.
US2721836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of antimony
Assignee: Harshaw Chemical Co
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Filing: 1952-08-07
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Granted: 1955-10-25
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Expires: 1972-08-07
Abstract
No abstract record available.
Inventors
- 👤 Rose Arthur H Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:01
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN AQUEOUS ANTIMONY PLATING SOLUTION COMPRISING ANTIMONY TRIFLUORIDE IN CONCENTRATION FROM 0.3 TO 0.9 MOL PER LITER, AN ALIPHATIC ALPHA HYDROXY CARBOXYLIC ACID IN QUANTITY FROM 1/8 TO 2 ALPHA HYDROXY EQUIVALENT WEIGHTS PER ATOMIC WEIGHT OF ANTIMONY AND AN ALKALINE COMPOUND IN QUANTITY TO PRODUCE A PH BETWEEN 2.5 AND 5.0.
Claim 2
Dependent Claim
52 words
AN AQUEOUS ANTIMONY PLATING SOLUTION COMPRISING ANTIMONY TRIFLUORIDE IN CONCENTRATION FROM 0.3 TO 0.9 MOL PER LITER, AN ALIPHATIC ALPHA HYDROXY CARBOXYLIC ACID IN QUANTITY FROM 1/8 TO 2 ALPHA HYDROXY EQUIVALENT WEIGHTS PER ATOMIC WEIGHT OF ANTIMONY AND AN ALKALINE COMPOUND IN QUANTITY TO PRODUCE A PH BETWEEN 2.5 AND 5.0.
References Cited (Backward Citations)
US792307A
Cited
US2389131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |