Patent US1416731A successfully refreshed from Google Patents.
US1416731A
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By-pass system for piston pumps
Assignee: Krupp Stahl AG
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Filing: 1920-09-25
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Granted: 1922-05-23
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Expires: 1940-09-25
Abstract
No abstract record available.
Inventors
- 👤 Martin Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:53
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/14; F04B1/18; F04B1/141; F04B1/143; F04B49/00; F04B49/22; F04B49/24; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304
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) | 1925-05-22 | 1925-11-21 | 1926-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-05-22 | 1929-11-21 | 1930-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-05-22 | 1933-11-21 | 1934-05-23 | $7700.00 | Window Closed / Lapsed |