US2635485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window operating device
Assignee: Standard Thomson Corp
•
Filing: 1948-11-08
•
Granted: 1953-04-21
•
Expires: 1968-11-08
Abstract
No abstract record available.
Inventors
- 👤 George E Gravenstine
- 👤 Robert H Hummert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:14
CPC Classifications
E; E05; E05F; E05F11/00; E05F11/02; E05F11/34; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19828; Y10T74/21; Y10T74/2186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US752393A
Cited
US683221A
Cited
US723482A
Cited
US2050403A
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US2114645A
Cited
US2184669A
Cited
US2214280A
Cited
US2304960A
Cited
US2321800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |