US2923787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switches
Assignee: Individual
•
Filing: 1957-04-04
•
Granted: 1960-02-02
•
Expires: 1977-04-04
Abstract
No abstract record available.
Inventors
- 👤 Oscar L Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:26
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/50; H01H13/52; H01H23/00; H01H23/02; H01H23/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1680428A
Cited
US1501019A
Cited
US1676155A
Cited
US1733085A
Cited
US2238621A
Cited
US2255330A
Cited
US2583756A
Cited
US2673468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |