Patent US2709666A successfully refreshed from Google Patents.
US2709666A
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Method of locally removing the insulation layer of enamelled wire
Assignee: Hartford National Bank and Trust Co
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Filing: 1951-04-19
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Granted: 1955-05-31
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Expires: 1971-04-19
Abstract
No abstract record available.
Inventors
- 👤 Speekman Bernardu Willebrordus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:59
CPC Classifications
C; C09; C09D; C09D9/00; C09D9/04; H; H02; H02G; H02G1/00; H02G1/12; H02G1/1287
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF LOCALLY REMOVING THE INSULATING LAYER OF WIRE ENAMELLED BY MEANS OF A SYNTHETIC ENAMEL-LACQUER COMPRISING THE STEPS OF IMMERSING SAID WIRE IN A BATH OF AN AROMATIC SULPHONIC ACID, HEATING SAID INSULATING LAYER TO A TEMPERATURE OF AT LEAST 220* C. IN ORDER TO FORM A CARBONIZED LAYER ON DAID WIRE, AND WIPING OFF SAID CARBONIZED LAYER, THUS LEAVING THE EXPOSED METAL SURFACE OF SAID WIRE.
Claim 2
Independent Claim
69 words
A METHOD OF LOCALLY REMOVING THE INSULATING LAYER OF WIRE ENAMELLED BY MEANS OF A SYNTHETIC ENAMEL-LACQUER COMPRISING THE STEPS OF IMMERSING SAID WIRE IN A BATH OF AN AROMATIC SULPHONIC ACID, HEATING SAID INSULATING LAYER TO A TEMPERATURE OF AT LEAST 220* C. IN ORDER TO FORM A CARBONIZED LAYER ON DAID WIRE, AND WIPING OFF SAID CARBONIZED LAYER, THUS LEAVING THE EXPOSED METAL SURFACE OF SAID WIRE.
References Cited (Backward Citations)
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US2432868A
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US2495729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |