Patent DE1213571B successfully refreshed from Google Patents.
US1108247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-producer.
Assignee: FRANK HAGERMAN
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Filing: 1911-03-01
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Granted: 1914-08-25
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Expires: 1931-03-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene A Schenck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:25
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/461; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2572
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) | 1917-08-24 | 1918-02-23 | 1918-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1921-08-24 | 1922-02-23 | 1922-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1925-08-24 | 1926-02-23 | 1926-08-25 | $7700.00 | Window Closed / Lapsed |