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Patent US2533428A successfully refreshed from Google Patents.
US2533428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure water system
Assignee: Individual
•
Filing: 1948-08-28
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Granted: 1950-12-12
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Expires: 1968-08-28
Abstract
No abstract record available.
Inventors
- 👤 Fred A Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:52
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/04; F04D9/06; E; E03; E03B; E03B5/00; E03B5/02; E03B5/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US345253A
Cited
US1191469A
Cited
US1560044A
Cited
US2133708A
Cited
US2257507A
Cited
US2380924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |