Patent US1798797A successfully refreshed from Google Patents.
US1798797A
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US
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Steam control of rotary feeding means
Assignee: Individual
•
Filing: 1929-06-24
•
Granted: 1931-03-31
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Expires: 1949-06-24
Abstract
No abstract record available.
Inventors
- 👤 Jones Philip
- 👤 Paul W Prutzman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:02
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/084; Y; Y10; Y10S; Y10S60/00; Y10S60/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-03-30 | 1934-09-29 | 1935-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-03-30 | 1938-09-29 | 1939-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-03-30 | 1942-09-29 | 1943-03-31 | $7700.00 | Window Closed / Lapsed |