Patent JPS558939A successfully refreshed from Google Patents.
US4137086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass compositions for use in curable compositions
Assignee: Pilkington Group Ltd
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Filing: 1977-11-17
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Granted: 1979-01-30
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Expires: 1997-11-17
Abstract
Abstract A novel calcium fluoroaluminosilicate glass consisting essentially of from 25 to 35% by weight of silicon calculated as silica, from 30 to 40% by weight of aluminum calculated as alumina, from 20 to 35% by weight calcium, calculated as calcium oxide, and up to 9% by weight fluorine (preferably 4-7%) can be associated with a poly(carboxylic acid e.g. as an intimate mixture of glass and acid to constitute a composition curable on contact with water and useful, for example, as a loading on a splinting bandage. Such a bandage preferably has a ratio of set time to gel time from 4:1 to 8:1 with a minimum gel time.
Inventors
- 👤 William D. Potter
- 👤 Andrew C. Barclay
- 👤 Reginald Dunning
- 👤 Richard J. Parry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:04
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/28; A; A61; A61L; A61L15/00; A61L15/07; A61L15/12; C03; C03C; C03C12/00; C03C3/00; C03C3/04; C03C3/062; C03C4/00; C03C4/0035
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
47 words
A calcium fluoroaluminosilicate glass consisting essentially of from 25 to 35% by weight of silicon calculated as silica, from 30 to 40% by weight of aluminum calculated as alumina, from 20 to 35% by weight calcium, calculated as calcium oxide, and up to 9% by weight fluorine.
Claim 2
Dependent Claim
47 words
A calcium fluoroaluminosilicate glass consisting essentially of from 25 to 35% by weight of silicon calculated as silica, from 30 to 40% by weight of aluminum calculated as alumina, from 20 to 35% by weight calcium, calculated as calcium oxide, and up to 9% by weight fluorine.
Claim 3
Dependent Claim
17 words
A glass as claimed in claim 1 in which the fluorine content is below 7% by weight.
Claim 4
Dependent Claim
19 words
A glass as claimed in claim 2 in which the fluorine content is from 4% to 7% by weight.
Claim 5
Dependent Claim
19 words
A glass as claimed in claim 3 in which the fluorine content is from 4.5% to 6.0% by weight.
Claim 6
Dependent Claim
18 words
A glass as claimed in claim 1 in which the silica: alumina ratio is from 0.7:1 to 1:1.
Claim 7
Dependent Claim
18 words
A glass as claimed in claim 5 in which the silica: alumina ratio is from 0.7:1 to 0.8:1.
Claim 8
Dependent Claim
17 words
A glass as claimed in claim 1 in which the calcium oxide:silica ratio is at least 1:1.
Claim 9
Dependent Claim
19 words
A glass as claimed in claim 1 containing up to 10% by weight of normally encountered compatible glass-making ingredients.
Claim 10
Dependent Claim
24 words
A glass as claimed in claim 1 containing from 25-35% silica, 30-38% alumina, 23-35% calcium oxide and 4-7% fluorine, all expressed in weight percentages.
Claim 11
Dependent Claim
24 words
A glass as claimed in claim 9 containing from 25-30% silica, 31-38% alumina, 27-33% calcium oxide and 4-7% fluorine, all expressed as weight percentages.
Claim 12
Dependent Claim
12 words
A glass as claimed in claim 1 in clear homogeneous non-opaline form.
Claim 13
Dependent Claim
12 words
A calcium fluoroaluminosilicate glass as claimed in claim 1 in particulate form.
Claim 14
Dependent Claim
20 words
A calcium fluoroaluminosilicate glass as claimed in claim 1 in a particulate form with particle size less than 100 microns.
Claim 15
Dependent Claim
20 words
A calcium fluoroaluminosilicate glass as claimed in claim 1 in a particulate form with particle size lss than 50 microns.
Claim 16
Dependent Claim
12 words
A calcium fluoroaluminosilicate glass as claimed in claim 3 in particulate form.
Claim 17
Dependent Claim
12 words
A calcium fluoroaluminosilicate glass as claimed in claim 9 in particulate form.
Claim 18
Dependent Claim
20 words
A calcium fluoroaluminosilicate glass as claimed in claim 9 in a particulate form with particle size less than 100 microns.
Claim 19
Dependent Claim
20 words
A calcium fluoroaluminosilicate glass as claimed in claim 9 in a particulate form with particle size less than 50 microns.
Claim 20
Dependent Claim
15 words
A calcium fluoroaluminosilicate glass according to claim 1 having 2 to 9% by weight fluorine.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |