US2715166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic relay
Assignee: International Business Machines Corp
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Filing: 1952-12-03
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Granted: 1955-08-09
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Expires: 1972-12-03
Abstract
No abstract record available.
Inventors
- 👤 Clyde J Fitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:25
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/60; H01H51/00; H01H51/28; H01H51/288; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
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) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |