Patent US2214229A successfully refreshed from Google Patents.
US2214229A
Expired / Lapsed
US
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Counterbalancing actuator for doors and the like
Assignee: Individual
•
Filing: 1937-10-05
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Granted: 1940-09-10
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Expires: 1957-10-05
Abstract
No abstract record available.
Inventors
- 👤 Otto T Frasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:26
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/40; E05D15/46; E05D15/463; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/404; E05Y2201/422; E05Y2201/426; E05Y2201/60; E05Y2201/622; E05Y2201/638; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-09-10 | 1944-03-11 | 1944-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-10 | 1948-03-11 | 1948-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-10 | 1952-03-11 | 1952-09-10 | $7700.00 | Window Closed / Lapsed |