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Patent US2472786A successfully refreshed from Google Patents.
US2472786A
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Method of pickling metal contact surfaces
Assignee: GTE Sylvania Inc
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Filing: 1943-08-21
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Granted: 1949-06-14
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Expires: 1963-08-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Edwin R Bowerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:52
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08; C23G1/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1526644A
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US1776603A
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US1773135A
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US1837118A
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GB412641A
Cited
US2039328A
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GB488656A
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US2295204A
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US2359095A
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US2326707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |