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Patent US3424838A successfully refreshed from Google Patents.
US3424838A
Expired / Lapsed
US
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Method of manufacturing a constriction-type pipette
Assignee: Individual
•
Filing: 1964-12-01
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Granted: 1969-01-28
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Expires: 1984-12-01
Abstract
No abstract record available.
Inventors
- 👤 Ole Buus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:38
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/021; B29; B29C; B29C67/00; B29C67/0014
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1583464A
Cited
US1896599A
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US2338524A
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US2507300A
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US2974367A
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US2997411A
Cited
US2972781A
Cited
US3091105A
Cited
US3150213A
Cited
US3254147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |