Patent US3401857A successfully refreshed from Google Patents.
Patent US3367527A successfully refreshed from Google Patents.
US3367527A
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Insulating structure
Assignee: HAROLD T DARLINGTON
•
Filing: 1967-05-01
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Granted: 1968-02-06
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Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 Harold T Darlington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:53
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/02; F17C3/025; F17C3/04; F17C3/06; F17C2201/00; F17C2201/01; F17C2201/0147; F17C2201/0157; F17C2201/03; F17C2201/032; F17C2203/00; F17C2203/03; F17C2203/0304; F17C2203/0329; F17C2203/0333; F17C2203/0345; F17C2203/035; F17C2203/0358; F17C2203/0391; F17C2203/06; F17C2203/0602; F17C2203/0604; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0646; F17C2203/0648; F17C2209/00; F17C2209/22; F17C2209/227; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2223/04; F17C2223/042; F17C2223/043; F17C2223/046; F17C2223/047; F17C2227/00; F17C2227/01; F17C2227/0128; F17C2227/0135; F17C2260/00; F17C2260/04; F17C2260/042; F17C2265/00; F17C2265/03; F17C2265/032; F17C2265/033; F17C2265/034; F17C2265/036; F17C2270/00; F17C2270/01; F17C2270/0102; F17C2270/0105; F17C2270/0165; F17C2270/0168; F17C2270/0171; F17C2270/0173; Y; Y10; Y10S; Y10S220/00; Y10S220/901; Y10S220/902
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |