US2799847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device and system
Assignee: Individual
•
Filing: 1951-04-21
•
Granted: 1957-07-16
•
Expires: 1971-04-21
Abstract
No abstract record available.
Inventors
- 👤 John L Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:45
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0225; G; G04; G04C; G04C3/00; G04C3/04; G04C3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2509693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |