US4401773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly reactive ion-leachable glass
Assignee: Johnson and Johnson
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Filing: 1980-11-07
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Granted: 1983-08-30
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Expires: 2000-11-07
Abstract
Abstract A method is provided for producing a highly reactive, ion-leachable glass for cement compositions. The method contemplates blending together a mixture of ion-leachable, inorganic compositions, forming the blended mixtures into shaped charges, heating the shaped charges to form a homogeneous melt, and finally blowing, in a gaseous mixture, to form partially solidified thin glass fibers. The method uniquely produces glass having a degree of crystallinity of less than 1 percent by weight in crystalline form.
Inventors
- 👤 Harold T. Smyth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:48
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/0035; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/889; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
32 words
A cementitious composition comprising: an ion-leachable inorganic component comprising ground glass having a degree of crystallinity of less than about 1% by weight of the crystalline form, and a proton donating compound.
Claim 2
Dependent Claim
32 words
A cementitious composition comprising: an ion-leachable inorganic component comprising ground glass having a degree of crystallinity of less than about 1% by weight of the crystalline form, and a proton donating compound.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein the proton donating compound is a carboxylic acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |