US2442497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically operated timing mechanism
Assignee: Individual
•
Filing: 1945-08-03
•
Granted: 1948-06-01
•
Expires: 1965-08-03
Abstract
No abstract record available.
Inventors
- 👤 Kelk William Hyde Hastings
- 👤 Burns Denis Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:42
CPC Classifications
H; H04; H04M; H04M19/00; H04M19/02; H03; H03B; H03B28/00; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US929602A
Cited
US1424328A
Cited
US1653736A
Cited
US1957672A
Cited
US2144033A
Cited
US2206660A
Cited
US2384792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |