US1784310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system
Assignee: JOHN R BLACKHALL
•
Filing: 1929-10-19
•
Granted: 1930-12-09
•
Expires: 1949-10-19
Abstract
No abstract record available.
Inventors
- 👤 Harvey S Pardee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:21
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; E05F15/53; E05F11/00; E05F11/02; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/51
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) | 1933-12-08 | 1934-06-09 | 1934-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-12-08 | 1938-06-09 | 1938-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-12-08 | 1942-06-09 | 1942-12-09 | $7700.00 | Window Closed / Lapsed |