US2530909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical pipette
Assignee: CARL A NISSON
•
Filing: 1947-11-14
•
Granted: 1950-11-21
•
Expires: 1967-11-14
Abstract
No abstract record available.
Inventors
- 👤 George S Riggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:32
CPC Classifications
B; B01; B01L; B01L9/00; B01L9/06; A; A61; A61M; A61M1/00; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/32; A61M5/34; B01L3/00; B01L3/02; B01L3/021; B01L3/0217; B01L3/0224; B01L3/0282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US404105A
Cited
US1361943A
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US730065A
Cited
US928351A
Cited
US1521822A
Cited
US2129675A
Cited
US2278253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |