US2906451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collection centrifuge
Assignee: Protein Foundation Inc
•
Filing: 1955-04-12
•
Granted: 1959-09-29
•
Expires: 1975-04-12
Abstract
No abstract record available.
Inventors
- 👤 James L Tullis
- 👤 Robert J Tinch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:02
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1401196A
Cited
US2678159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |