US2768046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating structures
Assignee: General Electric Co
•
Filing: 1952-07-09
•
Granted: 1956-10-23
•
Expires: 1972-07-09
Abstract
No abstract record available.
Inventors
- 👤 David W Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:04
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/06; F25D23/062; F25D2201/00; F25D2201/10; F25D2201/14; Y; Y10; Y10S; Y10S220/00; Y10S220/918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2509611A
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US2591003A
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US2544321A
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US2562056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |