US2946704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opaque glass
Assignee: Union Carbide Corp
•
Filing: 1956-10-18
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Granted: 1960-07-26
•
Expires: 1976-10-18
Abstract
No abstract record available.
Inventors
- 👤 Burnham W King
- 👤 Allison K Smalley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:03
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/10; C03C8/12; C03C4/00; C03C2204/00; C03C2204/04; C03C2207/00; C03C2207/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
A METHOD OF PRODUCING A WHITE, OPAQUE ENAMEL COATING ON A CAST IRON SURFACE COMPRISING PULVERIZING A FRIT CONSISTING ESSENTIALLY OF FROM 35 TO 65 PERCENT BY WEIGHT PBO, FROM 15 TO 40 PERCENT BY WEIGHT SI02, FROM 1 TO 15 PERCENT B2O3, FROM 1 TO 15 PERCENT BY V2O5, UP TO 14 PERCENT BY WEIGHT OF AT LEAST ONE ALKALI SELECTED FROM THE GROUP CONSISTING OF ZR/2, TIO2, AND AL2O3, APPLYING SAID FRIT ON THE CAST IRON SURFACE TO BE COATED, AND FIRING IT AT A TEMPERATURE BETWEEN ABOUT 1050*F. AND ABOUT 1350*F. TO OBTAIN AN ENAMEL COATING.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |