US4359505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light colored roofing granules
Assignee: ISP Investments LLC
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Filing: 1981-02-11
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Granted: 1982-11-16
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Expires: 2001-02-11
Abstract
Abstract Roofing granules coated with insolubilized reaction product of a coating composition comprising water, kaolin clay, sodium silicate, titanium dioxide and ammonium nitrate or nitrate of one or more group 1A metals.
Inventors
- 👤 Ingo B. Joedicke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:17
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/1055; E; E04; E04D; E04D7/00; E04D7/005; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/2438; Y10T428/24388; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
Aqueous coating composition suitable for coating roofing granules and comprising: (a) water; (b) kaolin clay; (c) sodium silicate; (d) titanium dioxide; and (e) bleaching agent selected from the group consisting of ammonium nitrate or nitrate of one or more group 1A metal, said bleaching agent being present in amounts between about 1 and about 4 wt. % based on the amount of kaolin clay in the coating composition.
Claim 2
Dependent Claim
68 words
Aqueous coating composition suitable for coating roofing granules and comprising: (a) water; (b) kaolin clay; (c) sodium silicate; (d) titanium dioxide; and (e) bleaching agent selected from the group consisting of ammonium nitrate or nitrate of one or more group 1A metal, said bleaching agent being present in amounts between about 1 and about 4 wt. % based on the amount of kaolin clay in the coating composition.
Claim 3
Dependent Claim
29 words
Coating composition of claim 1 wherein the clay is present in amounts between about 45 and about 65 wt % based on total coating composition on a dry basis.
Claim 4
Dependent Claim
30 words
Coating composition of claim 2 wherein sodium silicate is present in an amount between about 30 and about 40 wt % based on total coating composition on a dry basis.
Claim 5
Dependent Claim
12 words
Coating composition of claim 3 wherein the bleaching agent is sodium nitrate.
Claim 6
Dependent Claim
19 words
Roofing granules comprising base mineral granules having coating comprising insolubilized reaction product of the coating composition of claim 4.
Claim 7
Dependent Claim
13 words
Coating composition according to claim 3 wherein the bleaching agent is ammonium nitrate.
Claim 8
Dependent Claim
19 words
Roofing granules comprising base mineral granules having coating comprising insolubilized reaction product of the coating composition of claim 6.
Claim 9
Dependent Claim
19 words
Roofing granules comprising base mineral granules having coating comprising insolubilized reaction product of the coating composition of claim 4.
Claim 10
Dependent Claim
19 words
Roofing granules comprising base mineral granules having coating comprising insolubilized reaction product of the coating composition of claim 1.
Claim 11
Dependent Claim
23 words
Roofing granules of claim 9 wherein the coating has been insolubilized by firing at a temperature between about 600° and about 1200° F.
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) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |