Patent US4937323A successfully refreshed from Google Patents.
Patent US2559516A successfully refreshed from Google Patents.
US2559516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for combining fluids
Assignee: Standard Oil Development Co
•
Filing: 1949-04-01
•
Granted: 1951-07-03
•
Expires: 1969-04-01
Abstract
No abstract record available.
Inventors
- 👤 Francis R Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
C; C10; C10M; C10M3/00; B; B01; B01F; B01F27/00; B01F27/60; B01F27/05; B01F27/11; B01F27/113; C10M2207/00; C10M2207/28; C10M2207/30; C10M2209/00; C10M2209/10; C10M2209/11; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/085; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1691535A
Cited
US2078983A
Cited
US1993762A
Cited
US2103888A
Cited
US2212261A
Cited
US2307509A
Cited
US2369312A
Cited
US2374462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |