US2592876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor and stator for fluid handling machines having surfaces coated with gold
Assignee: Individual
•
Filing: 1946-07-22
•
Granted: 1952-04-15
•
Expires: 1966-07-22
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Earle
- 👤 Francis P Somers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:53
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US474527A
Cited
FR374586A
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US1504736A
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US1578929A
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US1623588A
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US1851806A
Cited
GB381102A
Cited
US2378372A
Cited
US2373499A
Cited
US2479046A
Cited
US2402474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |