US2554535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device
Assignee: Duracell Inc USA
•
Filing: 1947-02-25
•
Granted: 1951-05-29
•
Expires: 1967-02-25
Abstract
No abstract record available.
Inventors
- 👤 Long John Robert
- 👤 George O Puerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:43
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0208
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US214637A
Cited
GB190923224A
Cited
US1205434A
Cited
US1074215A
Cited
US1497206A
Cited
US1682905A
Cited
US1927934A
Cited
US2060836A
Cited
US2275917A
Cited
US2355041A
Cited
US2333319A
Cited
US2425030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |