US2905788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact structures for relays
Assignee: Potter & Blomfield Inc
•
Filing: 1957-03-14
•
Granted: 1959-09-22
•
Expires: 1977-03-14
Abstract
No abstract record available.
Inventors
- 👤 William J Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:57
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1294599A
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US2490963A
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US2472709A
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US2775671A
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US2666113A
Cited
US2647968A
Cited
US2749403A
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US2831939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |