Patent US2638187A successfully refreshed from Google Patents.
US2638187A
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Vacuum thermal insulating panel
Assignee: Individual
•
Filing: 1948-10-19
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Granted: 1953-05-12
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Expires: 1968-10-19
Abstract
No abstract record available.
Inventors
- 👤 John F P Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:29
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; E04B1/803; Y; Y02; Y02A; Y02A30/00; Y02A30/24; Y02A30/242; Y02B; Y02B80/00; Y02B80/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1425529A
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US1895667A
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DE585656C
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US1984007A
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AU807232A
Cited
FR796356A
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DE660454C
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US2142438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |