US3432884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vane-type powder feeder
Assignee: British Iron and Steel Research Association BISRA
•
Filing: 1965-11-26
•
Granted: 1969-03-18
•
Expires: 1985-11-26
Abstract
No abstract record available.
Inventors
- 👤 Edward Lysakowski
- 👤 John Kenny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:10
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/18; Y; Y10; Y10S; Y10S425/00; Y10S425/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1114884A
Cited
GB213956A
Cited
US1988676A
Cited
US2141512A
Cited
US2523642A
Cited
US2548009A
Cited
US2882554A
Cited
US3017665A
Cited
US3074105A
Cited
US3114930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |