Patent US4429827A successfully refreshed from Google Patents.
US3144033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Washer for waste paper stock
Assignee: Individual
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Filing: 1962-11-13
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Granted: 1964-08-11
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Harold T Stulberg
- 👤 James T Slevin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:27
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12; D21B1/30; D21B1/32; D21B1/325; D21C; D21C9/00; D21C9/02; D21C9/06; D21D; D21D5/00; D21D5/02; D21D5/04; D21D5/046; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
APPARATUS FOR WASHING CELLULOSE PULP, COMPRISING: A PLURALITY OF ELONGATED HORIZONTAL SCREENS DISPOSED IN A GENERALLY END TO END RELATIONSHIP WITH SUCCEEDING SCREENS OCCUPYING LOWER ELEVATIONS IN A STAIRCASE MANNER; MEANS FOR MOVING SAID SCREENS; A PLURALITY OF INCLINED IMPERFORATE PLATES CONNECTING THE CONTIGUOUS ENDS OF ADJACENT SCREENS, SAID PLATES BEING SO POSITIONED THAT A MASS REMOVED FROM THE TERMINAL END OF ONE SCREEN WILL PASS ALONG A PLATE BY GRAVITY TO THE INITIAL END OF THE ADJACENT LOWER SCREEN; PRESSURIZED FLUID MEANS OPERATIVE TO DIRECT A FLUID
Claim 2
Dependent Claim
88 words
APPARATUS FOR WASHING CELLULOSE PULP, COMPRISING: A PLURALITY OF ELONGATED HORIZONTAL SCREENS DISPOSED IN A GENERALLY END TO END RELATIONSHIP WITH SUCCEEDING SCREENS OCCUPYING LOWER ELEVATIONS IN A STAIRCASE MANNER; MEANS FOR MOVING SAID SCREENS; A PLURALITY OF INCLINED IMPERFORATE PLATES CONNECTING THE CONTIGUOUS ENDS OF ADJACENT SCREENS, SAID PLATES BEING SO POSITIONED THAT A MASS REMOVED FROM THE TERMINAL END OF ONE SCREEN WILL PASS ALONG A PLATE BY GRAVITY TO THE INITIAL END OF THE ADJACENT LOWER SCREEN; PRESSURIZED FLUID MEANS OPERATIVE TO DIRECT A FLUID
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |