US2844486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water dispersible talc pigment composition
Assignee: Sierra Talc and Clay Co
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Filing: 1956-12-26
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Granted: 1958-07-22
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Expires: 1976-12-26
Abstract
No abstract record available.
Inventors
- 👤 Richard S Lamar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:51
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/62; C; C09; C09C; C09C1/00; C09C1/28; D21H19/38; D21H19/40; D21J; D21J1/00; D21J1/08; C01; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/12; C01P2006/22; C01P2006/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A STRONGLY HYDROPHILIC TALC PIGMENT COMPRISING FINELY COMMINUTED TALC PARTICLES HAVING THEIR SURFACES AT LEAST PARTLY COATED WITH A NONIONIC SURFACTANT HAVING A HYDROPHOBIC PORTION CHEMICALLY BOUND TO A HYDROPHILIC PORTION CONSISTING OF POLYETHYLENE OXIDE GROUPS.
Claim 2
Dependent Claim
36 words
A STRONGLY HYDROPHILIC TALC PIGMENT COMPRISING FINELY COMMINUTED TALC PARTICLES HAVING THEIR SURFACES AT LEAST PARTLY COATED WITH A NONIONIC SURFACTANT HAVING A HYDROPHOBIC PORTION CHEMICALLY BOUND TO A HYDROPHILIC PORTION CONSISTING OF POLYETHYLENE OXIDE GROUPS.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |