Patent US1997418A successfully refreshed from Google Patents.
US1997418A
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Pumping mechanism
Assignee: Ingersoll Rand Co
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Filing: 1933-10-19
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Granted: 1935-04-09
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Expires: 1953-10-19
Abstract
No abstract record available.
Inventors
- 👤 Hornschuch Hanns
- 👤 Anthony L Mchugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:26
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/004; F04D9/005; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7832; Y10T137/7837; Y10T137/7838; Y10T137/7846; Y10T137/794; Y10T137/8085
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) | 1938-04-08 | 1938-10-08 | 1939-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-08 | 1942-10-08 | 1943-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-08 | 1946-10-08 | 1947-04-09 | $7700.00 | Window Closed / Lapsed |