US2822445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stored energy device
Assignee: McGraw Edison Co
•
Filing: 1955-04-22
•
Granted: 1958-02-04
•
Expires: 1975-04-22
Abstract
No abstract record available.
Inventors
- 👤 Schindler Carl
- 👤 Anthony Van Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:42
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/22; H01H3/30; H01H3/3042; F; F16; F16H; F16H33/00; F16H33/02; F16H2706/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US634068A
Cited
US1076314A
Cited
US1254060A
Cited
US1395802A
Cited
US1481777A
Cited
US1751903A
Cited
US1818698A
Cited
US2360422A
Cited
US2521978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |