Patent US1872503A successfully refreshed from Google Patents.
US1872503A
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US
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Proportional pumping apparatus
Assignee: Texaco Inc
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Filing: 1930-04-30
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Granted: 1932-08-16
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Expires: 1950-04-30
Abstract
No abstract record available.
Inventors
- 👤 William E Repschleger
- 👤 Jr George Armistead
- 👤 Bryan B Talbot
- 👤 Joseph G Placette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:07
CPC Classifications
F; F04; F04B; F04B13/00
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) | 1935-08-16 | 1936-02-15 | 1936-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-16 | 1940-02-15 | 1940-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-16 | 1944-02-15 | 1944-08-16 | $7700.00 | Window Closed / Lapsed |