US2538835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid handling device
Assignee: —
•
Filing: —
•
Granted: 1951-01-23
•
Expires: 1968-01-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:42
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/04; E03C1/0403; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87652; Y10T137/8766; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US531585A
Cited
US925436A
Cited
US1664901A
Cited
US1601979A
Cited
US1730455A
Cited
US1841737A
Cited
US1916553A
Cited
US2214619A
Cited
US2309900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |