US1662979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit closer
Assignee: Individual
•
Filing: 1927-05-07
•
Granted: 1928-03-20
•
Expires: 1947-05-07
Abstract
No abstract record available.
Inventors
- 👤 Paul R Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:22
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/02; F; F42; F42C; F42C19/00; F42C19/06; Y; Y10; Y10S; Y10S200/00; Y10S200/29; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791; Y10T137/7922; Y10T137/7927; Y10T137/7928
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) | 1931-03-20 | 1931-09-19 | 1932-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-03-20 | 1935-09-19 | 1936-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-03-20 | 1939-09-19 | 1940-03-20 | $7700.00 | Window Closed / Lapsed |