Patent US568854A successfully refreshed from Google Patents.
Patent US2998245A successfully refreshed from Google Patents.
US2998245A
Expired / Lapsed
US
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Power operator for elevator doors and the like
Assignee: Dover Corp
•
Filing: 1960-01-11
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Granted: 1961-08-29
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Expires: 1980-01-11
Abstract
No abstract record available.
Inventors
- 👤 Gilbert T Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:07
CPC Classifications
B; B66; B66B; B66B13/00; B66B13/02; B66B13/06; B66B13/08; E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/632; E05F15/649; E05Y; E05Y2400/00; E05Y2400/10; E05Y2400/30; E05Y2400/3013; E05Y2400/32; E05Y2400/322; E05Y2400/324; E05Y2400/326; E05Y2400/35; E05Y2400/354; E05Y2900/00; E05Y2900/10; E05Y2900/104; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/18936; Y10T74/20; Y10T74/20576; Y10T74/20582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1961938A
Cited
GB572189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |