US2577548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensated specific gravity measuring device
Assignee: Hagan Corp
•
Filing: 1948-07-27
•
Granted: 1951-12-04
•
Expires: 1968-07-27
Abstract
No abstract record available.
Inventors
- 👤 Otto B Vetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:32
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/26; G01N9/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1210180A
Cited
US1962324A
Cited
US2093254A
Cited
US2272970A
Cited
US2382853A
Cited
US2445255A
Cited
US2394549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |