Patent US722443A successfully refreshed from Google Patents.
US722443A
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Pressure-regulating device for pumps.
Assignee: E Goldman & Co
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Filing: 1900-07-27
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Granted: 1903-03-10
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Expires: 1920-07-27
Abstract
No abstract record available.
Inventors
- 👤 Richard Birkholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:17
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/7722; Y10T137/7837; Y10T137/785; Y10T137/7852; Y10T137/7853; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7932
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) | 1906-03-09 | 1906-09-08 | 1907-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-03-09 | 1910-09-08 | 1911-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-03-09 | 1914-09-08 | 1915-03-10 | $7700.00 | Window Closed / Lapsed |