Patent US2902170A successfully refreshed from Google Patents.
US2902170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test tube rack
Assignee: Daystrom Inc
•
Filing: 1955-09-29
•
Granted: 1959-09-01
•
Expires: 1975-09-29
Abstract
No abstract record available.
Inventors
- 👤 John H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:34
CPC Classifications
B; B01; B01L; B01L9/00; B01L9/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1043891A
Cited
US1172856A
Cited
US1188146A
Cited
US1810855A
Cited
US2532636A
Cited
US2646237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |