US2418932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making enamel coated articles
Assignee: AT&T Inc
•
Filing: 1940-11-13
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Granted: 1947-04-15
•
Expires: 1960-11-13
Abstract
No abstract record available.
Inventors
- 👤 Russel E Harr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:26
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/562; C23; C23D; C23D3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US708363A
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US1007388A
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US1127966A
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US1522291A
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US1837355A
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US1885700A
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US2131427A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-14 | 1950-10-14 | 1951-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-14 | 1954-10-14 | 1955-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-14 | 1958-10-14 | 1959-04-15 | $7700.00 | Window Closed / Lapsed |