US3403849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sludge centrifuge with intermittent discharge
Assignee: Alfa Laval AB
•
Filing: 1966-12-09
•
Granted: 1968-10-01
•
Expires: 1986-12-09
Abstract
No abstract record available.
Inventors
- 👤 Henric Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:22
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; B; B04; B04B; B04B1/00; B04B1/10; B04B1/14; B04B1/16; B04B1/18; H01S3/02; H01S3/03; H01S3/038; H01S3/0385; H01S3/0387; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3134932A
Cited
US3189267A
Cited
US3193194A
Cited
US3237854A
Cited
US3272430A
Cited
US3255958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |