US3256993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge
Assignee: Hein Lehmann and Co AG
•
Filing: 1963-10-17
•
Granted: 1966-06-21
•
Expires: 1983-10-17
Abstract
No abstract record available.
Inventors
- 👤 Siepe Werner
- 👤 Schmidt Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:45
CPC Classifications
B; B04; B04B; B04B3/00; B04B3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A CENTRIFUGE, COMPRISING A CASING, SAID CASING COMPRISING MEANS CONSTITUTING A DISCHARGE PASSAGE; A FIRST SIEVE DRUM, A SECOND SIEVE DRUM, MEANS SUPPORTING SAID DRUMS AXIALLY ONE BEHIND THE OTHER, AT LEAST SAID FIRST SIEVE DRUM BEING FRUSTOCONICAL IN SHAPE AND EXTENDING OUTWARDLY IN THE DIRECTION OF SAID DISCHARGE PASSAGE, MEANS ELASTICALLY INTERCONNECTING SAID DRUMS, MEANS OSCILLATING SAID DRUMS SUBSTANTIALLY AXIALLY RELATIVELY TO EACH OTHER, AND MEANS ROTATING SAID DRUMS JOINTLY.
Claim 2
Dependent Claim
71 words
A CENTRIFUGE, COMPRISING A CASING, SAID CASING COMPRISING MEANS CONSTITUTING A DISCHARGE PASSAGE; A FIRST SIEVE DRUM, A SECOND SIEVE DRUM, MEANS SUPPORTING SAID DRUMS AXIALLY ONE BEHIND THE OTHER, AT LEAST SAID FIRST SIEVE DRUM BEING FRUSTOCONICAL IN SHAPE AND EXTENDING OUTWARDLY IN THE DIRECTION OF SAID DISCHARGE PASSAGE, MEANS ELASTICALLY INTERCONNECTING SAID DRUMS, MEANS OSCILLATING SAID DRUMS SUBSTANTIALLY AXIALLY RELATIVELY TO EACH OTHER, AND MEANS ROTATING SAID DRUMS JOINTLY.
References Cited (Backward Citations)
US1057856A
Cited
US1963476A
Cited
US2312829A
Cited
US2883054A
Cited
US2964193A
Cited
US3133879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |