US2699224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode rapping system
Assignee: Research Corp
•
Filing: 1951-12-20
•
Granted: 1955-01-11
•
Expires: 1971-12-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:22
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/74; B03C3/76; B03C3/766
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1480937A
Cited
US1460586A
Cited
US2375946A
Cited
US2392088A
Cited
US2473506A
Cited
US2572385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |