Patent US2698734A successfully refreshed from Google Patents.
US2698734A
Expired / Lapsed
US
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Rotary machine with slip operating mechanism
Assignee: EMSCO Manufacturing Co
•
Filing: 1951-02-06
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Granted: 1955-01-04
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Expires: 1971-02-06
Abstract
No abstract record available.
Inventors
- 👤 Guglielmo R Tremolada
- 👤 Don F Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:11
CPC Classifications
E; E21; E21B; E21B3/00; E21B3/02; E21B3/04; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19637; Y10T74/19642; Y10T74/1966; Y10T74/19665
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1341702A
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US1555379A
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US1517979A
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US1656864A
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US1721024A
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US1812721A
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US2231923A
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US2545627A
Cited
US2564119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |