Patent US839912A successfully refreshed from Google Patents.
US839912A
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US
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Compression and vacuum relief-valve.
Assignee: Individual
•
Filing: 1905-03-01
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Granted: 1907-01-01
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Expires: 1925-03-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene B Whelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:25
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/007; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/022; A61B5/0235; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879; Y10T137/86895; Y10T137/877; Y10T137/87829
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) | 1909-12-31 | 1910-07-02 | 1911-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-12-31 | 1914-07-02 | 1915-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-12-31 | 1918-07-02 | 1919-01-01 | $7700.00 | Window Closed / Lapsed |