Patent US3793127A successfully refreshed from Google Patents.
US3793127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toughened glass
Assignee: Individual
•
Filing: 1971-11-30
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Granted: 1974-02-19
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Expires: 1991-11-30
Abstract
Abstract Toughened glass of thickness in the range 0.8 mm to 3.5 mm is obtained by quenching in a two-component liquid medium, and has a modulus of rupture of from 14 X 103 p.s.i. and, upon destruction by sharp impact fracture, shatters into from 8 to 100 fragments per cm2 of the glass.
Inventors
- 👤 E Wartenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:34
CPC Classifications
C; C03; C03C; C03C21/00; C03C21/001; C03B; C03B27/00; C03B27/02; C03B27/022; Y; Y10; Y10T; Y10T428/00; Y10T428/31; Y10T428/315
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
74 words
Toughened glass which comprises a glass sheet of soda-lime-silica composition having a thickness in the range of 0.8 mm to 3.5 mm, a modulus of rupture in the range of 14 X 103 p.s.i. to 42 X 103 p.s.i., and a fragmentation number upon destruction by sharp impact which is within the range of 8 fragments per cm2 to 100 fragments per cm2, the fragments being characterised by granular nature free of sharp edges.
Claim 2
Dependent Claim
79 words
Toughened glass which comprises a sheet of glass of soda-lime-silica composition and having (1) a thickness in the range of 0.8 mm to 3.5 mm, (2) a modulus of rupture in the range of 14 X 103 p.s.i. to 42 X 103 p.s.i., and (3) a fragmentation number upon destruction by sharp impact which is within the range of 8 fragments per cm2 to 100 fragments per cm2, the fragments being characterised by granular nature free of sharp edges.
Claim 3
Dependent Claim
81 words
For use in a vehicle windscreen, a sheet of glass of soda-lime-silica composition and having (1) a thickness in the range of 0.8 mm to 3.5 mm, (2) a modulus of rupture in the range of 14 X 103 p.s.i. to 56 X 103 p.s.i., and (3) a fragmentation number upon destruction by sharp impact which is within the range of 8 fragments per cm2 to 100 fragments per cm2, the fragments being characterised by granular nature free of sharp edges.
Claim 4
Dependent Claim
79 words
For use in a vehicle windscreen, a sheet of toughened glass of soda-lime-silica composition which sheet has a thickness in the range of 0.8 mm to 3.5 mm, a modulus of rupture in the range 14 X 103 p.s.i. to 42 X 103 p.s.i., and a fragmentation number upon destruction by sharp impact which is within the range of 8 fragments per cm2 to 100 fragments per cm2, the fragments being characterised by granular nature free of sharp edges.
Claim 5
Dependent Claim
93 words
Toughened glass comprising a sheet of glass of soda-lime-silica composition having a thickness within the range of 0.8 mm to 3.5 mm, a modulus of rupture within the range of 14 X 103 p.s.i. to 56 X 103 p.s.i., a fragmentation number upon destruction by sharp impact which is within the range of 8 fragments per cm2 to 100 fragments per cm2, and having a substantially continuous variation in stress therein, commencing with maximum compressive stress at the glass surfaces and extending to maximum tensile stress in the central region between the surfaces.
Claim 6
Dependent Claim
92 words
Toughened glass which comprises a glass sheet of soda-lime-silica composition having a thickness in the range 0.8 mm to 3.5 mm, a modulus of rupture within the range of 14 X 103 p.s.i. to 42 X 103 p.s.i., a fragmentation number upon destruction by sharp impact which is within the range of 8 fragments per cm2 to 100 fragments per cm2, and having a substantially continuous variation in stress therein, commencing with maximum compressive stress at the glass sUrfaces and extending to maximum tensile stress in the central region between the surfaces.
Claim 7
Dependent Claim
58 words
Liquid quenched toughened glass of soda-lime-silica of a thickness in the range 1.5 mm to 2.5 mm, having a modulus of rupture in the range 14 X 103 p.s.i. to 42 X 103 p.s.i., and a fragmentation number upon destruction by sharp impact which is within the range of 8 fragments per cm2 to 75 fragments per cm2.
Claim 8
Dependent Claim
71 words
Toughened glass which comprises a glass sheet of soda-lime-silica composition having a thickness in the range 1.5 to 2.5 mm, a modulus of rupture in the range 14 X 103 p.s.i. to 28 X 103 p.s.i., and a fragmentation number upon destruction by sharp impact which is within the range of 8 fragments per cm2 to 65 fragments per cm2, the fragments being characterised by granular nature free of sharp edges.
Claim 9
Dependent Claim
87 words
Liquid quenched toughened glass of soda-lime-silica composition having (1) a thickness of 1.8 mm, (2) a modulus of rupture in the range 14 X 103 p.s.i. to 56 X 103 p.s.i., and (3) a fragmentation number upon destruction by sharp impact which is within the range of 8 fragments per cm2 to 75 fragments per cm2, and having a substantially continuous variation in stress therein, commencing with maximum compressive stress at the glass surfaces and extending to maximum tensile stress in the central region between the surfaces.
Claim 10
Dependent Claim
71 words
Toughened glass which comprises a sheet of glass of soda-lime-silica composition having (1) a thickness of 1.8 mm (2) a modulus of rupture in the range 14 X 103 p.s.i. to 42 X 103 p.s.i., and (3) a fragmentation number upon destruction by sharp impact which is within the range of 8 fragments per cm2 to 75 fragments per cm2, the fragments being characterised by granular nature free of sharp edges.
Claim 11
Dependent Claim
64 words
Toughened glass which comprises a sheet of soda-lime-silica glass of thickness 1.8 mm, having a modulus of rupture in the range 14 X 103 p.s.i. to 28 X 103 p.s.i., and a fragmentation number upon destruction by sharp impact which is within the range 15 fragments per cm2 to 45 fragments per cm2, the fragments being characterised by granular nature free of sharp edges.
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |