Patent US1258570A successfully refreshed from Google Patents.
US1258570A
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US
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Apparatus for utilizing an expansive force.
Assignee: HUMPHREY GAS PUMP Co
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Filing: 1911-10-21
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Granted: 1918-03-05
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Expires: 1931-10-21
Abstract
No abstract record available.
Inventors
- 👤 Herbert Alfred Humphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:15
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/08; F04B9/10; F04F; F04F1/00; F04F1/06; F04F1/16
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) | 1921-03-04 | 1921-09-03 | 1922-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-03-04 | 1925-09-03 | 1926-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-03-04 | 1929-09-03 | 1930-03-05 | $7700.00 | Window Closed / Lapsed |