Patent US4094822A successfully refreshed from Google Patents.
Patent US1788034A successfully refreshed from Google Patents.
US1788034A
Expired / Lapsed
US
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Feeding device
Assignee: Ingersoll Rand Co
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Filing: 1930-02-11
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Granted: 1931-01-06
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Expires: 1950-02-11
Abstract
No abstract record available.
Inventors
- 👤 Sr William A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:50
CPC Classifications
E; E21; E21B; E21B44/00; E21B44/02; E21B44/08
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) | 1934-01-05 | 1934-07-07 | 1935-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-01-05 | 1938-07-07 | 1939-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-01-05 | 1942-07-07 | 1943-01-06 | $7700.00 | Window Closed / Lapsed |