US2979235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hopper having means causing atmospheric inflow
Assignee: Arthur G McKee and Co
•
Filing: 1958-01-09
•
Granted: 1961-04-11
•
Expires: 1978-01-09
Abstract
No abstract record available.
Inventors
- 👤 Melvin J Greaves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:45
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/10; F27D2003/0034; F27D2003/0063; F27D3/0033
Claims Analysis
Total Claims: 0
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US2792262A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |