Patent US4332908A successfully refreshed from Google Patents.
US4332908A
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US
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Foamed granular glass
Assignee: INGEBORG VIOL
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Filing: 1979-11-27
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Granted: 1982-06-01
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Expires: 1999-11-27
Abstract
Abstract The blown granular glass consists of fragments of a blown glass element and comprises at least 100,000, preferably 1,000,000, per cm 3 of bubbles approximately of the same size. It is obtained by grinding the race material into a flour; the flour is mixed into a hot gas by a blowing means; the mixture is blown into a flat base furnace in an amount of blown glass; this amount is cooled after blowing and directly after cooling it is crushed into a granulated material.
Inventors
- 👤 Otto A. Vieli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:22
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/10; C03B19/108; C03C; C03C11/00; C03C11/007; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/22; C04B14/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
50 words
Foamed granular glass, characterized in that it consists of fragments of a foamed glass element having at least 100,000 cavities per cm 3 of at least approximately the same size; it has a compressive strength greater than 130 kg/cm 2 ; and it has a specific weight of about 0.25.
Claim 2
Dependent Claim
50 words
Foamed granular glass, characterized in that it consists of fragments of a foamed glass element having at least 100,000 cavities per cm 3 of at least approximately the same size; it has a compressive strength greater than 130 kg/cm 2 ; and it has a specific weight of about 0.25.
Claim 3
Dependent Claim
21 words
Foamed granular glass as claimed in claim 1, characterized in that it comprises at least 500,000 cavities per cm 3 .
Claim 4
Dependent Claim
21 words
Foamed granular glass as claimed in claim 2, characterized in that it comprises at least 1,000,000 cavities per cm 3 .
Claim 5
Dependent Claim
22 words
Foamed granular glass as claimed in any of claims 1 to 3, characterized in that the grains of granulate have seamed edges.
References Cited (Backward Citations)
US3321414A
Cited
US3562370A
Cited
US3666506A
Cited
JPS535213A
Cited
US4143202A
Cited
US4234330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |