US2494121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timed electrical system
Assignee: Individual
•
Filing: 1948-05-11
•
Granted: 1950-01-10
•
Expires: 1968-05-11
Abstract
No abstract record available.
Inventors
- 👤 Loren O Grainger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:56
CPC Classifications
C; C25; C25D; C25D21/00; C25D21/12; C25D21/14; Y; Y10; Y10S; Y10S204/00; Y10S204/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1821205A
Cited
US1947263A
Cited
US2096626A
Cited
US2216167A
Cited
US2158887A
Cited
US2228436A
Cited
US2290732A
Cited
US2244880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |