US2529028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical feeder
Assignee: LANDON STANDARD POOLS
•
Filing: 1947-07-31
•
Granted: 1950-11-07
•
Expires: 1967-07-31
Abstract
No abstract record available.
Inventors
- 👤 Everett W Landon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/8593; Y10T137/8597
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US417046A
Cited
US417034A
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US434392A
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US549479A
Cited
US637250A
Cited
US1412473A
Cited
US2238747A
Cited
US2417372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |