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US2477129A
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US
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High-frequency induction brazing apparatus
Assignee: AT&T Inc
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Filing: 1945-11-03
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Granted: 1949-07-26
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Expires: 1965-11-03
Abstract
No abstract record available.
Inventors
- 👤 Joel R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:29
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US995509A
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US1804637A
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US2177299A
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US2279371A
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US2182799A
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US2239385A
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US2361517A
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US2351392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |