Patent US2643144A successfully refreshed from Google Patents.
US2643144A
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US
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Swivel unit
Assignee: NARAS RES Inc
•
Filing: 1950-08-03
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Granted: 1953-06-23
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Expires: 1970-08-03
Abstract
No abstract record available.
Inventors
- 👤 Schwartz Nathan Rodney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:58
CPC Classifications
H; H01; H01R; H01R33/00; H01R33/94; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32549; Y10T403/32557; Y10T403/32565; Y10T403/32573
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US897410A
Cited
US1796009A
Cited
US1992828A
Cited
US2041847A
Cited
US2298176A
Cited
US2546061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |