US2904459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-corrosive soldering flux for electrical application
Assignee: Tamura Works Ltd
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Filing: 1957-03-18
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Granted: 1959-09-15
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Expires: 1977-03-18
Abstract
No abstract record available.
Inventors
- 👤 Kubota Tadashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:42
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3615
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
IN A SOLDERING FLUX FOR ELECTRICAL APPLICATION WHICH CONTAINS ROSIN, THE IMPROVEMENT WHEREIN ABIETIC ACID IN THE ROSIN HAS BEEN CONVERTED TO AT LEAST ONE AMINE SALT SELECTED FROM THE GROUP CONSISTING OF ABIETIC ACID-DIETHYLENETRIAMINE SALT, ABIETIC ACID-DIBUTYLAMINE SALT AND ABIETIC-ACID-DIAMYLAMINE SALT.
Claim 2
Dependent Claim
42 words
IN A SOLDERING FLUX FOR ELECTRICAL APPLICATION WHICH CONTAINS ROSIN, THE IMPROVEMENT WHEREIN ABIETIC ACID IN THE ROSIN HAS BEEN CONVERTED TO AT LEAST ONE AMINE SALT SELECTED FROM THE GROUP CONSISTING OF ABIETIC ACID-DIETHYLENETRIAMINE SALT, ABIETIC ACID-DIBUTYLAMINE SALT AND ABIETIC-ACID-DIAMYLAMINE SALT.
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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |