Patent US2952762A successfully refreshed from Google Patents.
US2907925A
Expired / Lapsed
US
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Printed circuit techniques
Assignee: GERTRUDE M PARSONS
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Filing: 1955-09-29
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Granted: 1959-10-06
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Expires: 1975-09-29
Abstract
No abstract record available.
Inventors
- 👤 Gertrude M Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:22
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/40; H05K3/42; H05K3/429; H05K1/00; H05K1/02; H05K1/0284; H05K2201/00; H05K2201/09; H05K2201/09009; H05K2201/09018
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) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |