US3512323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated wall structure
Assignee: Whirlpool Corp
•
Filing: 1967-07-21
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Granted: 1970-05-19
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Expires: 1987-07-21
Abstract
No abstract record available.
Inventors
- 👤 Ronald K Hupfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:58
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; E04C2/296; E04C2/30; E04C2/38; E04C2/384; F; F25; F25D; F25D23/00; F25D23/08; F25D23/082; F25D23/085; Y; Y10; Y10S; Y10S220/00; Y10S220/03; Y10S220/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |