Patent US2764860A successfully refreshed from Google Patents.
US2764860A
Expired / Lapsed
US
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Plug for test tubes and the like, and method and machine for making and inserting plugs
Assignee: Individual
•
Filing: 1949-02-23
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Granted: 1956-10-02
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Expires: 1969-02-23
Abstract
No abstract record available.
Inventors
- 👤 James A Harrison
- 👤 Troisi Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:28
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; B01L3/50825
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US755275A
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CH183805A
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US2130005A
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US2264586A
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US2269722A
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US2319234A
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US2304932A
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US2455925A
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US2318379A
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US2318380A
Cited
US2412089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |