US2568677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube rack for qualitative chemical analysis
Assignee: Individual
•
Filing: 1948-05-17
•
Granted: 1951-09-18
•
Expires: 1968-05-17
Abstract
No abstract record available.
Inventors
- 👤 Fred L Adelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:20
CPC Classifications
B; B01; B01L; B01L9/00; B01L9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1296158A
Cited
FR646001A
Cited
US1836138A
Cited
US1821313A
Cited
US1902566A
Cited
US1965032A
Cited
US1948902A
Cited
US1966734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |