US4104076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of novel grey and bronze glasses
Assignee: Saint Gobain Industries SA
•
Filing: 1976-09-08
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Granted: 1978-08-01
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Expires: 1996-09-08
Abstract
Abstract A method of making heat absorbing glass which comprises melting the raw materials of ordinary silica-soda-lime glass and incorporating therein during melting a quantity of the tinting agents Fe 2 O 3 , CoO, Se, UO 2 and Cr 2 O 3 sufficient to produce in a piece 2-12 mm. thick a purity of excitation less than 14%, a total transmission of solar energy less than 50%, and a factor of luminance Y between 35 and 55%, and shaping articles therefrom.
Inventors
- 👤 Andre Pons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:54
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/02; C03C1/00; C03C1/10; C03C14/00; C03C14/006; C03C3/00; C03C3/04; C03C3/076; C03C3/078; C03C3/089; C03C3/091; C03C4/08; C03C4/082
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A tinted silica-soda-lime glass consisting in its essential elements, by weight percent, of: SiO 2 60-75%, B 2 O 3 0-7%, Al 2 O 3 0-5%, K 2 O + Na 2 O 10-20% of which K 2 O is 0-10%, CaO + MgO 6-18% of which CaO is 0- 16% and MgO is 0-10%, and containing by weight percent of tinting agents: Fe 2 O 3 0.2-1.5%, CoO 0.0010-0.0300%, Se 0-0.0200%, and Cr 2 O 3 0.0010-0.0200%.
Claim 2
Dependent Claim
78 words
A tinted silica-soda-lime glass consisting in its essential elements, by weight percent, of: SiO 2 60-75%, B 2 O 3 0-7%, Al 2 O 3 0-5%, K 2 O + Na 2 O 10-20% of which K 2 O is 0-10%, CaO + MgO 6-18% of which CaO is 0- 16% and MgO is 0-10%, and containing by weight percent of tinting agents: Fe 2 O 3 0.2-1.5%, CoO 0.0010-0.0300%, Se 0-0.0200%, and Cr 2 O 3 0.0010-0.0200%.
Claim 3
Dependent Claim
62 words
A tinted glass according to claim 1 in which the content of said tinting agents in the glass is such as to produce a purity of excitation less than 14%, a total transmission of solar energy less than 50%, and a factor of luminance Y between 35 and 55% for a thickness of the glass of about 2 to about 12 mm.
Claim 4
Dependent Claim
29 words
A tinted bronze glass having the glass content of claim 1 and the tinting agents: Fe 2 O 3 0.2-1.5%, CoO 0.0010-0.0200%, Se 0.0015-0.0200%, Cr 2 O 3 0.0010-0.0100%.
Claim 5
Dependent Claim
49 words
Glass according to claim 3 in which a content of tinting agents such as to produce in glass 2-12 mm. thick a purity of excitation between 7 and 14%, a factor of luminance Y between 40 and 55%, and a wave length dominant between about 575 and 585 nm.
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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) | 1981-07-31 | 1982-01-30 | 1982-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-31 | 1986-01-30 | 1986-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-31 | 1990-01-30 | 1990-08-01 | $7700.00 | Window Closed / Lapsed |