US3140796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planchet
Assignee: Sigma Chemical Co
•
Filing: 1962-08-22
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Granted: 1964-07-14
•
Expires: 1982-08-22
Abstract
No abstract record available.
Inventors
- 👤 Broida Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:16
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
IN A CUPPED PLANCHET THE IMPROVEMENT COMPRISING A FLAT BOTTOM HAVING A PLURALITY OF CONCENTRIC ANNULAR RIDGES IN ITS INNER SURFACE, THE INNERMOST OF SAID RIDGES DEFINING A CENTRAL BASIN IN SAID BOTTOM AND THE OUTERMOST OF SAID RIDGES DEFINING, WITH A CIRCUMFERENTIAL RIM, AN ANNULAR OUTER CHANNEL, AND A PLURALITY OF RADIALLY EXTENDING, SYMMETRICALLY POSITIONED RIBS ON THE INNER SURFACE OF THE BOTTOM, SAID RIBS EXTENDING BETWEEN THE RADIALLY OUTER SIDE OF THE INNERMOST RIDGE AND THE RADIALLY INNER SIDE OF THE OUTERMOST RIDGE, WHEREBY THE BASIN AND OUTER CHANNEL ARE UNINTERRUPTED BY SAID RIBS, AND SAID RIBS BEING OF A HEIGHT LESS THAN THE HEIGHT OF SAID ANNULAR RIDGES.
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) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |