Patent US2662840A successfully refreshed from Google Patents.
US2662840A
Expired / Lapsed
US
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Solder flux life extender
Assignee: Dewey and Almy Chemical Co
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Filing: 1953-02-19
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Granted: 1953-12-15
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Expires: 1973-02-19
Abstract
No abstract record available.
Inventors
- 👤 William C Shilling
- 👤 George W Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:24
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/30; B; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; B23K35/22; B23K35/36; B23K35/3601; B23K35/3603
Claims Analysis
Total Claims: 0
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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) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |