US2660531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of vitreous glazes or enamels for coating metals
Assignee: Individual
•
Filing: 1949-05-16
•
Granted: 1953-11-24
•
Expires: 1969-05-16
Abstract
No abstract record available.
Inventors
- 👤 Fraser Reginald Percy
- 👤 Cianchi Alfredo Luigi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:59
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/04; C03C2207/00; C03C2207/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
38 words
A LEAD-FREE AND FLUORINE-FREE VITREOUS ENAMELING COMPOSITION SUITABLE FOR BONDING TO THE SURFACE OF ALUMINUM AND ALUMINUM BASE ALLOYS, SAID COMPOSITION HAVING A FUSION OF MATURING TEMPERATURE BELOW 600* C. AND A COEFFICIENT OF THERMAL EXPANSION GREATER THAN
Claim 2
Dependent Claim
38 words
A LEAD-FREE AND FLUORINE-FREE VITREOUS ENAMELING COMPOSITION SUITABLE FOR BONDING TO THE SURFACE OF ALUMINUM AND ALUMINUM BASE ALLOYS, SAID COMPOSITION HAVING A FUSION OF MATURING TEMPERATURE BELOW 600* C. AND A COEFFICIENT OF THERMAL EXPANSION GREATER THAN
Claim 3
Dependent Claim
1 words
0X10-6
Claim 4
Dependent Claim
1 words
0X10-6
References Cited (Backward Citations)
FR610645A
Cited
US1833087A
Cited
US1944938A
Cited
DE602244C
Cited
AT156822B
Cited
FR868052A
Cited
US2414633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |