US3154603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of spherical contact particles
Assignee: Wyeth Holdings LLC
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Filing: 1961-08-02
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Granted: 1964-10-27
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Expires: 1981-08-02
Abstract
No abstract record available.
Inventors
- 👤 Witheford John Maurice
- 👤 Cullo Leonard Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:50
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/20; B01J21/00; B01J21/02; B01J21/04; B01J21/14; B01J21/16; C; C04; C04B; C04B35/00; C04B35/01; C04B35/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR PREPARING SPHERICAL CONTACT PARTICLES WHICH COMPRISES EXPRESSING A DEFORMABLE PLASTIC CONTACT MASS THROUGH AN ORIFICE TO FORM A DEFORMABLE PLASTIC EXTRUDATE, SUCCESSIVELY SLICING SAID EXTRUDATE FROM SAID ORIFICE TO FORM DEFORMABLE PLASTIC CYLINDERS, SHAPING SAID DEFORMABLE PLASTIC CYLINDERS BY MEANS OF CENTRIFUGAL FORCES
Claim 2
Dependent Claim
46 words
A PROCESS FOR PREPARING SPHERICAL CONTACT PARTICLES WHICH COMPRISES EXPRESSING A DEFORMABLE PLASTIC CONTACT MASS THROUGH AN ORIFICE TO FORM A DEFORMABLE PLASTIC EXTRUDATE, SUCCESSIVELY SLICING SAID EXTRUDATE FROM SAID ORIFICE TO FORM DEFORMABLE PLASTIC CYLINDERS, SHAPING SAID DEFORMABLE PLASTIC CYLINDERS BY MEANS OF CENTRIFUGAL FORCES
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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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |