Patent FR1092268A successfully refreshed from Google Patents.
US4866010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel ion-free blue glass composition
Assignee: Automotive Components Holdings LLC
•
Filing: 1989-02-17
•
Granted: 1989-09-12
•
Expires: 2009-02-17
Abstract
Abstract A blue glass composition is disclosed. This blue glass composition is based on a standard formulation for soda/lime silica glass, except that neither the basic glass composition nor the coloring components therefor contains nickel. The blue glass color is developed by using coloring components consisting essentially of 0.3-0.6% Fe2O3, 0.004-0.008% Co3O4, and 0.0001-001% Se. The particular blue color of the glass is a neutral blue having a dominant wavelength of 482 nm+/-1 nm, color purity of 13%+/-1% and transmission (T) equal to at least 54%+/-1% using Illuminant C (corrected to 0.25 inch glass thickness).
Inventors
- 👤 Edward N. Boulos
- 👤 Patricia B. Reid
- 👤 Robert F. Tweadey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:27
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/10; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03C4/00; C03C4/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A blue glass composition having no nickel ion contained therein and having a dominant wavelength of 482 nm±1 nm, color purity of 13%±1% and light transmission (T) equal to 54%±1% using Illuminant C corrected to 0.25 inch glass thickness, and consisting essentially of the following base components in percent by weight: 68-75% SiO 2 , 0-5% Al 2 O 3 , 5-15% CaO, 0-10% MgO, 10-18% Na 2 O, 0-5% K 2 O, where CaO+Mgo is 6-15% and Na 2 O+K 2 O is 10-20%, together with coloring components of 0.42% Fe 2 O 3 , 0.005% Co 3 O 4 , and 0.0003% Se.
Claim 2
Dependent Claim
105 words
A blue glass composition having no nickel ion contained therein and having a dominant wavelength of 482 nm±1 nm, color purity of 13%±1% and light transmission (T) equal to 54%±1% using Illuminant C corrected to 0.25 inch glass thickness, and consisting essentially of the following base components in percent by weight: 68-75% SiO 2 , 0-5% Al 2 O 3 , 5-15% CaO, 0-10% MgO, 10-18% Na 2 O, 0-5% K 2 O, where CaO+Mgo is 6-15% and Na 2 O+K 2 O is 10-20%, together with coloring components of 0.42% Fe 2 O 3 , 0.005% Co 3 O 4 , and 0.0003% Se.
References Cited (Backward Citations)
CA684730A
Cited
CA711746A
Cited
CA516737A
Cited
CA568513A
Cited
CA570195A
Cited
US25312A
Cited
CA618642A
Cited
CA802275A
Cited
US2524719A
Cited
US2923635A
Cited
USRE25312E
Cited
US2956892A
Cited
US3328150A
Cited
US3291621A
Cited
US3296004A
Cited
US3296005A
Cited
US3498806A
Cited
US3466180A
Cited
US3523779A
Cited
US3628932A
Cited
US3723142A
Cited
US4104076A
Cited
GB1331492A
Cited
US4339541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |