US2457234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electrolytically determining the thickness of metal coatings
Assignee: IIT Research Institute
•
Filing: 1943-09-25
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Granted: 1948-12-28
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Expires: 1963-09-25
Abstract
No abstract record available.
Inventors
- 👤 William S Herbert
- 👤 Howard T Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:41
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; G01B7/10; G01B7/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1725877A
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US1771680A
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US1739657A
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US2135873A
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GB483503A
Cited
US2206026A
Cited
US2319196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |