US3487606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency and duration control for electrode rappers
Assignee: Beazer East Inc
•
Filing: 1968-04-10
•
Granted: 1970-01-06
•
Expires: 1988-04-10
Abstract
No abstract record available.
Inventors
- 👤 Richard J Bridges
- 👤 Paul D Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:20
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/74; B03C3/76; B03C3/763
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA591169A
Cited
US2858900A
Cited
US2854089A
Cited
US2978065A
Cited
US3030753A
Cited
US2922085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |