US2921113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical condensers
Assignee: AT&T Inc
•
Filing: 1954-05-12
•
Granted: 1960-01-12
•
Expires: 1974-05-12
Abstract
No abstract record available.
Inventors
- 👤 Dale R Clemons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:15
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/224
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1303325A
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GB260773A
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US1898789A
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US2047023A
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US1993560A
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US2142705A
Cited
US2242784A
Cited
US2596134A
Cited
US2523083A
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US2668278A
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US2711498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |