Patent US2640859A successfully refreshed from Google Patents.
US2640859A
Expired / Lapsed
US
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Apparatus for producing porcelain enamel
Assignee: Vibrantz Corp
•
Filing: 1950-12-02
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Granted: 1953-06-02
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Expires: 1970-12-02
Abstract
No abstract record available.
Inventors
- 👤 Robert E Skinner
- 👤 Glenn H Mcintyre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:05
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/02; C03B5/027; C03B5/03; C03B5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1552555A
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US1799371A
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US1815977A
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US1889516A
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US1944855A
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US2040215A
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US2122469A
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US2198304A
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US2283188A
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US2559683A
Cited
US2610217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |