Patent US3438532A successfully refreshed from Google Patents.
US3438532A
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Assignee: Lummus Technology LLC
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Filing: 1967-02-06
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Granted: 1969-04-15
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Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Vadim G Chibaeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:09
CPC Classifications
F; F17; F17C; F17C1/00; F17C1/02; F17C2201/00; F17C2201/01; F17C2201/0128; F17C2201/03; F17C2201/035; F17C2201/05; F17C2201/052; F17C2203/00; F17C2203/01; F17C2203/011; F17C2203/012; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0614; F17C2203/0617; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0678; F17C2205/00; F17C2205/01; F17C2205/0153; F17C2205/018; F17C2205/0184; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/03; F17C2223/033; F17C2223/035; F17C2260/00; F17C2260/01; F17C2260/011; F17C2260/017; F17C2260/018; F17C2270/00; F17C2270/01; F17C2270/0134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1997808A
Cited
US2562601A
Cited
FR993903A
Cited
US2562602A
Cited
US2961118A
Cited
FR1275701A
Cited
US3019806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |