Patent US4655966A successfully refreshed from Google Patents.
US4655966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of an antimony oxide-doped tin oxide pigment with improved electrical conductivity properties, and white and tinted conductive paints containing this pigment which are useful for the removal of electrostatic charges
Assignee: M.A.P.
•
Filing: 1985-08-01
•
Granted: 1987-04-07
•
Expires: 2005-08-01
Abstract
Abstract The invention relates to a process for the preparation of an antimony oxide-doped tin oxide pigment with a white or off-white color and a surface electrical resistance not exceeding 20 ohms/square, comprising the intimate mixing of tin oxide and antimony oxide, then heating the resultant mixture to a high temperature, in which a proportion of 1.25 to 10 parts by weight of antimony oxide Sb 2 O 3 per 100 parts by weight of tin oxide SnO 2 is mixed and the mixture of Sb 2 O 3 and of SnO 2 is calcined at a temperature in the range from 900° to 950° C. Application for the manufacture of electrically conductive white or colored paints which are useful particularly in aeronautics.
Inventors
- 👤 Jean-Claude Guillaumon
- 👤 Louis J. C. Blet
- 👤 Francoise M. J. B. Guerard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:46
CPC Classifications
C; C09; C09C; C09C1/00; C09D; C09D5/00; C09D5/24; C01; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2006/00; C01P2006/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
A process for producing an antimony oxide-doped tin oxide pigment comprising the steps of intimately mixing 1.25 to 10 parts by weight of antimony oxide powder present as Sb 2 O 3 with 100 parts by weight of tin oxide powder present as SnO 2 and thereafter firing the resultant mixture at a temperature in the range of from 900° to 950° C., to provide an oxide-doped tin oxide pigment having a white to off-white color and a surface electrical resistance not exceeding 20 ohms/square.
Claim 2
Dependent Claim
85 words
A process for producing an antimony oxide-doped tin oxide pigment comprising the steps of intimately mixing 1.25 to 10 parts by weight of antimony oxide powder present as Sb 2 O 3 with 100 parts by weight of tin oxide powder present as SnO 2 and thereafter firing the resultant mixture at a temperature in the range of from 900° to 950° C., to provide an oxide-doped tin oxide pigment having a white to off-white color and a surface electrical resistance not exceeding 20 ohms/square.
Claim 3
Dependent Claim
23 words
A process as claimed in claim 1, wherein 2.5 to 5 parts of antimony oxide are mixed per 100 parts of tin oxide.
Claim 4
Dependent Claim
35 words
A white or colored paint comprising at least one pigment, at least one binder, and at least one solvent wherein said at least one pigment is a pigment produced by the process of claim 1.
Claim 5
Dependent Claim
34 words
The paint of claim 3 which additionally contains at least one electrically nonconductive pigment, and wherein the weight ratio of the electrically nonconductive pigment to the pigment of claim 6 does not exceed 1:1.
Claim 6
Dependent Claim
25 words
The paint of claim 3 in which the weight ratio of total pigments to the binder is in the range of from 1.5 to 4.
References Cited (Backward Citations)
US3502597A
Cited
US3923698A
Cited
US4397915A
Cited
US4113507A
Cited
US4246143A
Cited
US4373013A
Cited
US4431764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |