US2780090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating structure
Assignee: INV DEV CORP
•
Filing: 1952-09-18
•
Granted: 1957-02-05
•
Expires: 1972-09-18
Abstract
No abstract record available.
Inventors
- 👤 Peter D Rasmussen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:18
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/7675; E04B1/7608; E04B1/7612; Y; Y10; Y10S; Y10S264/00; Y10S264/02; Y10S62/00; Y10S62/13; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US675403A
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US1277923A
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US2116270A
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US2037995A
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US2076898A
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US2135079A
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US2208191A
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US2216251A
Cited
US2556031A
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US2522116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |