US3074553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for screening pulp
Assignee: Individual
•
Filing: 1960-04-14
•
Granted: 1963-01-22
•
Expires: 1980-04-14
Abstract
No abstract record available.
Inventors
- 👤 Henry F Szepan
- 👤 Guy E Sanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
APPARATUS FOR SCREENING PULP COMPRISING: A STATIONARY CYLINDRICAL SCREEN; A SHELL SURROUNDING SAID SCREEN, SAID SHELL HAVING AN INLET OPENING AND OUTLET OPENINGS FOR ACCEPTED AND REJECTED STOCK, SAID SHELL HAVING PRESSURE RESISTANT ENDS; A MULTIPLE BLADED ROTOR WITHIN SAID SCREEN, SAID ROTOR BEING SECURED TO A SHAFT PENETRATING BOTH ENDS OF SAID SHELL AND A VACUUM SEALED BEARING AT EACH END
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |