Patent US2610933A successfully refreshed from Google Patents.
US2610933A
Expired / Lapsed
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Brazing flux
Assignee: Union Carbide Corp
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Filing: 1949-11-08
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Granted: 1952-09-16
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Expires: 1969-11-08
Abstract
No abstract record available.
Inventors
- 👤 Louis E Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:36
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3601; B23K35/3606
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
26 words
A WELDING AND BRAZING FLUX SUBSTANTIALLY FREE OF ALKALI METAL COMPOUNDS AND CONTAINING 1% TO 20% OF ZINC BORATE, THE REMAINDER BORIC ACID AND INCIDENTAL IMPURITIES.
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) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |