US2524816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving kaolin and products thereof
Assignee: Bird Machine Co Inc
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Filing: 1946-02-21
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Granted: 1950-10-10
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Expires: 1966-02-21
Abstract
No abstract record available.
Inventors
- 👤 Sanford C Lyons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:30
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/025; D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/40
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
46 words
A MATERIAL SUITABLE FOR USE IN PAPER COATING AND OTHER PURPOSES HAVING ENHANCED WHITENESS AND LOW VISCOSITY IN AQUEOUS SUSPENSION, CONSISTING OF A CLAY CONTAINING PARTICLES OF ALL SIZES FROM ABOUT 10 MICRONS TO .25 MICRON INCLUSIVE AND BEING SUBSTANTIALLY FREE FROM PARTICLES LARGER THAN 10
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) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |