US2620426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature electric insulating construction
Assignee: McGraw Electric Co
•
Filing: 1949-09-03
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Granted: 1952-12-02
•
Expires: 1969-09-03
Abstract
No abstract record available.
Inventors
- 👤 David A Gustafson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:08
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/06; A47J37/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US950058A
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GB614587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |