US1295848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for reducing wear in the working barrels of pumps.
Assignee: GEORGE HAMMAN
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Filing: 1918-01-11
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Granted: 1919-03-04
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Expires: 1938-01-11
Abstract
No abstract record available.
Inventors
- 👤 Robert E Carmichael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:06
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/005; F16J1/006; F16J1/008
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) | 1922-03-03 | 1922-09-02 | 1923-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-03-03 | 1926-09-02 | 1927-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-03-03 | 1930-09-02 | 1931-03-04 | $7700.00 | Window Closed / Lapsed |