US2550308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical condenser
Assignee: Telegraph Condenser Co Ltd
•
Filing: 1945-06-27
•
Granted: 1951-04-24
•
Expires: 1965-06-27
Abstract
No abstract record available.
Inventors
- 👤 Sporing Percy Archibald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:52
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1440142A
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US1537386A
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US1571501A
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US1831092A
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US1603640A
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GB247881A
Cited
US1754268A
Cited
US1963606A
Cited
US1965007A
Cited
US1937010A
Cited
US2348693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |