Patent US2604779A successfully refreshed from Google Patents.
US2604779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring capillary pressure
Assignee: Shell Development Co
•
Filing: 1948-05-11
•
Granted: 1952-07-29
•
Expires: 1968-05-11
Abstract
No abstract record available.
Inventors
- 👤 William R Purcell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:20
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/088; G01N15/0886
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1932767A
Cited
US2327642A
Cited
US2293488A
Cited
US2323556A
Cited
US2390252A
Cited
US2465948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |