US3254767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relatively movable bar screen with cleaners
Assignee: Individual
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Filing: 1962-04-10
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Granted: 1966-06-07
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Expires: 1982-04-10
Abstract
No abstract record available.
Inventors
- 👤 Wehner Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:38
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/282; B07B1/46; B07B1/50; B07B13/00; B07B13/10; B07B13/11; B07B13/113
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A SIFTING SCREEN COMPRISING AT LEAST TWO ADJACENT LONGITUDINALLY EXTENDING PARALLEL SPACED BARS; A PLURALITY OF CROSSPIECES DISPOSED BETWEEN OPPOSING SURFACES OF SAID BARS, SAID CROSSPIECES ARRANGED SYMMETRICALLY BETWEEN ADJACENT BARS AND EXTENDING SUBSTANTIALLY ALONG THE LENGTH OF SAID BARS, SAID CROSSPIECES HAVING OPPOSING SIDE WALLS SLIGHTLY SPACED FROM THE RESPECTIVE ADJACENT SURFACES OF SAID BARS AND HASVING END WALLS SPACED FROM THE END WALLS OF ADJACENT ONES OF SAID CROSSPIECES; FIRST PIVOT PIN MEANS LATERALLY EXTENDING FROM ONE OF THE SIDE WALLS OF SAID CROSSPIECES TO ONE OF SAID BARS FOR ECCENTRICALLY AND ROTATABLY CONNECTIONG SAID CROSSPIECES TO ONE OF SAID BARS; SECOND PIVOT PIN MEANS LATERALLY EXTENDING FROM THE OTHER OF THE SIDE WALLS OF SAID CROSSPIECES TO THE OTHER OF SAID BARS FOR ECCENTRICALLY ROTATABLY CONNECTING SAID CROSSPIECES TO SAID OTHER OF SAID BARS, SAID SECOND PIVOT PIN MEANS BEING IN OFFSET SPACED RELATION WITH RESPECT TO SAID FIRST PIVOT PIN MEANS, THE DISTACNE BETWEEN THE RESPECTIVE ONES OF SAID PIVOT PIN MEANS OF CONSECUTIVE ONES OF SAID CROSSPIECES NOT EXCEEDING THE DIAMETER OF SAID CROSSPIECES
Claim 2
Dependent Claim
179 words
A SIFTING SCREEN COMPRISING AT LEAST TWO ADJACENT LONGITUDINALLY EXTENDING PARALLEL SPACED BARS; A PLURALITY OF CROSSPIECES DISPOSED BETWEEN OPPOSING SURFACES OF SAID BARS, SAID CROSSPIECES ARRANGED SYMMETRICALLY BETWEEN ADJACENT BARS AND EXTENDING SUBSTANTIALLY ALONG THE LENGTH OF SAID BARS, SAID CROSSPIECES HAVING OPPOSING SIDE WALLS SLIGHTLY SPACED FROM THE RESPECTIVE ADJACENT SURFACES OF SAID BARS AND HASVING END WALLS SPACED FROM THE END WALLS OF ADJACENT ONES OF SAID CROSSPIECES; FIRST PIVOT PIN MEANS LATERALLY EXTENDING FROM ONE OF THE SIDE WALLS OF SAID CROSSPIECES TO ONE OF SAID BARS FOR ECCENTRICALLY AND ROTATABLY CONNECTIONG SAID CROSSPIECES TO ONE OF SAID BARS; SECOND PIVOT PIN MEANS LATERALLY EXTENDING FROM THE OTHER OF THE SIDE WALLS OF SAID CROSSPIECES TO THE OTHER OF SAID BARS FOR ECCENTRICALLY ROTATABLY CONNECTING SAID CROSSPIECES TO SAID OTHER OF SAID BARS, SAID SECOND PIVOT PIN MEANS BEING IN OFFSET SPACED RELATION WITH RESPECT TO SAID FIRST PIVOT PIN MEANS, THE DISTACNE BETWEEN THE RESPECTIVE ONES OF SAID PIVOT PIN MEANS OF CONSECUTIVE ONES OF SAID CROSSPIECES NOT EXCEEDING THE DIAMETER OF SAID CROSSPIECES
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |