US2898218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porcelain enamels
Assignee: Vibrantz Corp
•
Filing: 1957-02-06
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Granted: 1959-08-04
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Expires: 1977-02-06
Abstract
No abstract record available.
Inventors
- 👤 Wendell G Voss
- 👤 Francis C Ellinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:41
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/06; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/112; C03C3/115; C03C8/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24752; Y10T428/2476
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
A PROCELAIN ENAMEL COMPOSITION CONSISTING ESSENTIALLY OF A NON-OPACIFIED BOROSILICATE PORECLAIM ENAMEL, SAID COMPOSITION CONTAINER UP TO 5.0% TO P2O5, THE TOTAL ALKALI METAL CONTENT OF SAID COMPOSITION BEING FROM ABOUT 8.5% TO ABOUT 21.5% AND THE NA2O COMPRISING FROM 60.5% TO ABOUT 88.25% OF THE TOTAL ALKALI METAL CONTENT AND SAID COMPOSITION CONTAINING FROM ABOUT 0.8% TO ABOUT 3.5% F2 AND FROM ABOUT 9.0% TO ABOUT 19.0% MNO2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |