US3902913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrous calcium silicate insulation products
Assignee: Owens Corning
•
Filing: 1973-09-10
•
Granted: 1975-09-02
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Expires: 1993-09-10
Abstract
Abstract Hydrous calcium silicate insulation products reinforced with a particular combination of organic fibers and alkali-resistant glass fibers are disclosed.
Inventors
- 👤 Jerry L Helser
- 👤 Richard F Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:31
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18; C04B28/186; C04B28/188; C04B2111/00; C04B2111/20; C04B2111/28; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
15 words
HYDROUS CALCIUM SILICATE INSULATING PRODUCTS COMPRISING THE FOLLOWING MATERIALS IN PERCENT BY WEIGHT OF SOLIDS:
Claim 2
Dependent Claim
15 words
HYDROUS CALCIUM SILICATE INSULATING PRODUCTS COMPRISING THE FOLLOWING MATERIALS IN PERCENT BY WEIGHT OF SOLIDS:
Claim 3
Dependent Claim
38 words
Insulation products according to claim 1 wherein the amount of organic fibers ranges from 5 to 10 percent by weight of solids and the amount of glass fibers ranged from 0.5 to 2.5 percent by weight of solids.
Claim 4
Dependent Claim
22 words
Insulation products according to claim 1 wherein the organic fibers are bleached wood pulp and the glass fibers are zirconia glass fibers.
Claim 5
Dependent Claim
18 words
Insulation products according to claim 1 wherein the hydrous calcium silicate is tobermorite, zonotlite or a mixture thereof.
Claim 6
Dependent Claim
17 words
Insulation products according to claim 1 having a density between 10 and 20 pounds per cubic foot.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |