Patent US2139013A successfully refreshed from Google Patents.
US1594792A
Expired / Lapsed
US
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Test-tube holder
Assignee: L E KNOTT APPARATUS Co
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Filing: 1925-07-16
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Granted: 1926-08-03
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Expires: 1945-07-16
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Mortimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:26
CPC Classifications
B; B01; B01L; B01L9/00; B01L9/50; B25; B25B; B25B9/00; B25B9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-08-02 | 1930-02-01 | 1930-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-08-02 | 1934-02-01 | 1934-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-08-02 | 1938-02-01 | 1938-08-03 | $7700.00 | Window Closed / Lapsed |