US2598307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid flow regulating system
Assignee: Akzona Inc
•
Filing: 1949-12-12
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Granted: 1952-05-27
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Expires: 1969-12-12
Abstract
No abstract record available.
Inventors
- 👤 Rutgers Ulrich Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:06
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; D01D1/09; D01D1/065; D01F; D01F1/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2617; Y10T137/2622; Y10T137/2642; Y10T137/2645; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/8593; Y10T137/85978; Y10T137/86131
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1272212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |