US2621597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air charger for water systems
Assignee: Jacuzzi Brothers Inc
•
Filing: 1947-05-24
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Granted: 1952-12-16
•
Expires: 1967-05-24
Abstract
No abstract record available.
Inventors
- 👤 John E Armstrong
- 👤 Jacuzzi Candido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:38
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/3137
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |