Patent US2728828A successfully refreshed from Google Patents.
US2728828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fused electric plug
Assignee: Individual
•
Filing: 1954-12-30
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Granted: 1955-12-27
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Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Charles E Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:32
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/66; H01R13/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US804114A
Cited
GB185832A
Cited
US2063723A
Cited
US2131292A
Cited
US2257608A
Cited
US2404407A
Cited
US2599023A
Cited
US2640126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |