Patent US2643515A successfully refreshed from Google Patents.
US2643515A
Expired / Lapsed
US
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Electric control system for expansible motor operated boom
Assignee: Individual
•
Filing: 1950-10-17
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Granted: 1953-06-30
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Expires: 1970-10-17
Abstract
No abstract record available.
Inventors
- 👤 Chester A Harsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:30
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; B66F11/044; B66F11/046; Y; Y10; Y10S; Y10S60/00; Y10S60/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1761726A
Cited
US1968422A
Cited
US2030986A
Cited
US2254083A
Cited
US2334323A
Cited
US2450152A
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 |