US4170658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium carbonate filler
Assignee: GEORGIA MARBLE COMPANY 1500 NORTH DALE MABRY HIGHWAY TAMPA FLORIDA 33631 A DE CORP
•
Filing: 1976-01-28
•
Granted: 1979-10-09
•
Expires: 1996-01-28
Abstract
Abstract An improved calcium carbonate filler in the form of a powder having a particle size distribution range and other identifiable physical characteristics produces unexpected results as a filler in resin molding compounds.
Inventors
- 👤 David L. Skinner
- 👤 Edward L. Moon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/02; C09C1/021; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C01; C01P; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/10; C01P2006/12; C01P2006/14; C01P2006/19; C01P2006/22; C01P2006/60; C01P2006/80; C01P2006/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A calcium carbonate filler powder characterized by a porosity of less than 53 percent by pore volume analysis, by a Fisher Sub-Sieve Sizer diameter of between 2.60 and 2.90 microns, by a specific surface area of between 1.75 and 2.00 square meters per gram and by a particle size distribution as determined by a Sedigraph 5000 Analyzer as follows: ______________________________________
Cumulative Diameter Range
Mass Percent finer than (Microns, Micrometers)
______________________________________
100 20 - 22
95 17 - 18
90 15 - 17
85 14 - 16
80 13.5 - 15
75 13.0 - 14
70 12.0 - 13.5
65 11.5 - 13.3
60 11.0 - 13.0
55 10.0 - 12.5
50 9.8 - 12.0
45 9.0 - 11.5
40 8.0 - 10.5
35 6.8 - 10.0
30 5.1 - 8.0
25 5.0 - 5.8
20 2.5 - 3.5
15 1.7 - 2.2
10 1.0 - 1.2
5 0.55 - 0.65
2 0.35 - 0.40
0 0.20 - 0.20
______________________________________
Claim 2
Dependent Claim
159 words
A calcium carbonate filler powder characterized by a porosity of less than 53 percent by pore volume analysis, by a Fisher Sub-Sieve Sizer diameter of between 2.60 and 2.90 microns, by a specific surface area of between 1.75 and 2.00 square meters per gram and by a particle size distribution as determined by a Sedigraph 5000 Analyzer as follows: ______________________________________
Cumulative Diameter Range
Mass Percent finer than (Microns, Micrometers)
______________________________________
100 20 - 22
95 17 - 18
90 15 - 17
85 14 - 16
80 13.5 - 15
75 13.0 - 14
70 12.0 - 13.5
65 11.5 - 13.3
60 11.0 - 13.0
55 10.0 - 12.5
50 9.8 - 12.0
45 9.0 - 11.5
40 8.0 - 10.5
35 6.8 - 10.0
30 5.1 - 8.0
25 5.0 - 5.8
20 2.5 - 3.5
15 1.7 - 2.2
10 1.0 - 1.2
5 0.55 - 0.65
2 0.35 - 0.40
0 0.20 - 0.20
______________________________________
Claim 3
Dependent Claim
114 words
A calcium carbonate filler powder characterized by a porosity of less than 53 percent by pore volume analysis, by a Fisher Sub-Sieve Sizer diameter of between 2.60 and 2.90 microns, by a specific surface area of between 1.75 and 2.0 square meters per gram and by a particle size distribution as determined by a Sedigraph 5000 analyzer as follows: ______________________________________
Cumulative Diameter
Mass Percent
finer than
(Microns, Micrometers)
______________________________________
100 21
95 17.5
90 16
85 15
80 14.2
75 13.5
70 12.7
65 12.3
60 12
55 11.2
50 10.5
45 10.2
40 9.2
35 8.4
30 6.5
25 4.9
20 3.0
15 2.0
10 1.1
5 .60
2 .37
0 .20
______________________________________
Claim 4
Dependent Claim
114 words
A calcium carbonate filler powder characterized by a porosity of less than 53 percent by pore volume analysis, by a Fisher Sub-Sieve Sizer diameter of between 2.60 and 2.90 microns, by a specific surface area of between 1.75 and 2.0 square meters per gram and by a particle size distribution as determined by a Sedigraph 5000 analyzer as follows: ______________________________________
Cumulative Diameter
Mass Percent
finer than
(Microns, Micrometers)
______________________________________
100 21
95 17.5
90 16
85 15
80 14.2
75 13.5
70 12.7
65 12.3
60 12
55 11.2
50 10.5
45 10.2
40 9.2
35 8.4
30 6.5
25 4.9
20 3.0
15 2.0
10 1.1
5 .60
2 .37
0 .20
______________________________________
Claim 5
Dependent Claim
120 words
A calcium carbonate filler powder characterized by a particle size distribution as determined by a Sedigraph 5000 analyzer as follows: ______________________________________
Cumulative Diameter Range
Mass Percent finer than (Microns, Micrometers)
______________________________________
100 20 - 22
95 17 - 18
90 15 - 17
85 14 - 16
80 13.5 - 15
75 13.0 - 14
70 12.0 - 13.5
65 11.5 - 13.3
60 11.0 - 13.0
55 10.0 - 12.5
50 9.8 - 12.0
45 9.0 - 11.5
40 8.0 - 10.5
35 6.8 - 10.0
30 5.1 - 8.0
25 5.0 - 5.8
20 2.5 - 3.5
15 1.7 - 2.2
10 1.0 - 1.2
5 0.55 - 0.65
2 0.35 - 0.40
0 0.20 - 0.20
______________________________________
Claim 6
Dependent Claim
120 words
A calcium carbonate filler powder characterized by a particle size distribution as determined by a Sedigraph 5000 analyzer as follows: ______________________________________
Cumulative Diameter Range
Mass Percent finer than (Microns, Micrometers)
______________________________________
100 20 - 22
95 17 - 18
90 15 - 17
85 14 - 16
80 13.5 - 15
75 13.0 - 14
70 12.0 - 13.5
65 11.5 - 13.3
60 11.0 - 13.0
55 10.0 - 12.5
50 9.8 - 12.0
45 9.0 - 11.5
40 8.0 - 10.5
35 6.8 - 10.0
30 5.1 - 8.0
25 5.0 - 5.8
20 2.5 - 3.5
15 1.7 - 2.2
10 1.0 - 1.2
5 0.55 - 0.65
2 0.35 - 0.40
0 0.20 - 0.20
______________________________________
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |