US2134448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic relay
Assignee: Koninklijke Philips NV
•
Filing: 1937-08-07
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Granted: 1938-10-25
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Expires: 1957-08-07
Abstract
No abstract record available.
Inventors
- 👤 Knos Gunnar Borge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:53
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/56; H01H50/58; H01H1/00; H01H1/12; H01H1/14; H01H1/24; H01H1/26; H01H2001/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-10-24 | 1942-04-25 | 1942-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-24 | 1946-04-25 | 1946-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-24 | 1950-04-25 | 1950-10-25 | $7700.00 | Window Closed / Lapsed |