US2220847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing device for control circuits
Assignee: UNITED STATES PATENT DEVELOPMENT AND ROYALTY Co
•
Filing: 1939-05-18
•
Granted: 1940-11-05
•
Expires: 1959-05-18
Abstract
No abstract record available.
Inventors
- 👤 Jacob J Neuman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:40
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/04; B04B11/043
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1943-11-05 | 1944-05-06 | 1944-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-05 | 1948-05-06 | 1948-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-05 | 1952-05-06 | 1952-11-05 | $7700.00 | Window Closed / Lapsed |