Patent US3230581A successfully refreshed from Google Patents.
US3230581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber mixer
Assignee: Goodyear Tire and Rubber Co
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Filing: 1964-01-06
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Granted: 1966-01-25
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Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 David Z Tyson
- 👤 Louis F Comper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:10
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/02; B29B7/06; B29B7/10; B29B7/18; B29B7/183; B29B7/186; B29B7/22; B29B7/26; B29B7/263; B29B7/266; B29B7/74; B29B7/7476; B29B7/7495
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN AN INTERNAL MIXER OF THE CHARACTER DESCRIBED, A PAIR OF COUNTER-ROTATING PARALLEL ROTORS, EACH ROTOR HAVING A PAIR OF LONG SUBSTANTIALLY DIAMETRICALLY OPPOSED VANES EXTENDING FROM ONE END OF THE ROTOR TOWARD THE OPPOSITE END AND A PAIR OF SHORT SUBSTANTIALLY DIAMETRICALLY OPPOSED VANES EXTENDING FROM THE OPPOSITE END TOWARD SAID ONE END WITH THE INBOARD ENDS OF THE LONG AND SHORT VANES TERMINATING ADJACENT A COMMON PLANE WHICH IS NORMAL TO THE AXIS OF ROTATION OF THE ROTOR AND IS BETWEEN THE ROTOR ENDS, THE LONG AND SHORT VANES EXTENDING IN A HELICAL DIRECTION RELATIVE TO THE CENTERLINE OF THE ROTOR TO MOVE THE STOCK TOWARD THE INBOARD ENDS OF THE VANES, THE LONG VANES OF ONE ROTOR BEING ADJACENT THE
Claim 2
Dependent Claim
123 words
IN AN INTERNAL MIXER OF THE CHARACTER DESCRIBED, A PAIR OF COUNTER-ROTATING PARALLEL ROTORS, EACH ROTOR HAVING A PAIR OF LONG SUBSTANTIALLY DIAMETRICALLY OPPOSED VANES EXTENDING FROM ONE END OF THE ROTOR TOWARD THE OPPOSITE END AND A PAIR OF SHORT SUBSTANTIALLY DIAMETRICALLY OPPOSED VANES EXTENDING FROM THE OPPOSITE END TOWARD SAID ONE END WITH THE INBOARD ENDS OF THE LONG AND SHORT VANES TERMINATING ADJACENT A COMMON PLANE WHICH IS NORMAL TO THE AXIS OF ROTATION OF THE ROTOR AND IS BETWEEN THE ROTOR ENDS, THE LONG AND SHORT VANES EXTENDING IN A HELICAL DIRECTION RELATIVE TO THE CENTERLINE OF THE ROTOR TO MOVE THE STOCK TOWARD THE INBOARD ENDS OF THE VANES, THE LONG VANES OF ONE ROTOR BEING ADJACENT THE
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |