US2584461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical crystal-contact device
Assignee: Hazeltine Research Inc
•
Filing: 1950-05-10
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Granted: 1952-02-05
•
Expires: 1970-05-10
Abstract
No abstract record available.
Inventors
- 👤 James Emrys Gwynne
- 👤 Lindell Aubrey Oscar Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:47
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H10D48/34; H10D48/345; H10D10/00; H10D62/00; H10D64/00; H10D64/20; H10D64/23; H10D99/00; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W74/00; H10W74/10; H10W76/00; H10W76/60; H10W99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |