Patent US2991594A successfully refreshed from Google Patents.
US2991594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine device
Assignee: Sheffield Corp
•
Filing: 1957-10-17
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Granted: 1961-07-11
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Expires: 1977-10-17
Abstract
No abstract record available.
Inventors
- 👤 George C Brown
- 👤 Richard N Roney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:30
CPC Classifications
B; B24; B24B; B24B1/00; B24B1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |