Patent US2644029A successfully refreshed from Google Patents.
US2644029A
Expired / Lapsed
US
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Natural silk insulated electric conductor
Assignee: Connollys Blackley Ltd
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Filing: 1949-07-27
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Granted: 1953-06-30
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Expires: 1969-07-27
Abstract
No abstract record available.
Inventors
- 👤 Travis William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:06
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/48; H01B3/50; H01B3/185; H01B7/00; H01B7/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
AN ELECTRIC CONDUCTOR PROVIDED DIRECTLY ON THE SURFACE THEREOF WITH AN INSULATING COVERING CONSISTING OF A HELICALLY LAPPED LAYER OF NATURAL SILK THREADS IN WHICH THE MAJOR PROPORTION OF THE NATURALLY OCCURRING SERICIN GUM IS RETAINED. SAID SERICIN GUM BONDING SAID THREADS TOGETHER.
References Cited (Backward Citations)
US171185A
Cited
US473713A
Cited
GB189503685A
Cited
US2070714A
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US2012610A
Cited
US2109087A
Cited
US2436421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |