US2398523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Fluor Corp
•
Filing: 1943-02-22
•
Granted: 1946-04-16
•
Expires: 1963-02-22
Abstract
No abstract record available.
Inventors
- 👤 Flon James G De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/522; F04D29/526; F04D29/54; F04D29/541; F04D29/542; F04D29/544
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-04-15 | 1949-10-15 | 1950-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-15 | 1953-10-15 | 1954-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-15 | 1957-10-15 | 1958-04-16 | $7700.00 | Window Closed / Lapsed |