Patent US2841241A successfully refreshed from Google Patents.
US2841241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collecting electrode
Assignee: Research Cottrell Inc
•
Filing: 1956-03-09
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Granted: 1958-07-01
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Expires: 1976-03-09
Abstract
No abstract record available.
Inventors
- 👤 Paul F Eilenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:24
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/40; B03C3/60; B03C3/45; B03C3/47
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1785258A
Cited
US1843510A
Cited
US1992974A
Cited
US2381455A
Cited
US2626008A
Cited
US2601906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |