US3530573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machined circuit element process
Assignee: Sprague Electric Co
•
Filing: 1967-02-24
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Granted: 1970-09-29
•
Expires: 1987-02-24
Abstract
No abstract record available.
Inventors
- 👤 Walter Helgeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:00
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/24; B; B23; B23K; B23K26/00; B23K26/36; B23K26/40; B23K2103/00; B23K2103/08; B23K2103/30; B23K2103/42; B23K2103/50; B23K2103/52; B23K2103/54; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3423260A
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US3422386A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |