Patent US2315184A successfully refreshed from Google Patents.
US2315184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for and method of maintaining the water of swimming pools at substantially unifrm temperature
Assignee: Individual
•
Filing: 1941-10-07
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Granted: 1943-03-30
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Expires: 1961-10-07
Abstract
No abstract record available.
Inventors
- 👤 Edward W N Boosey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:27
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/12; E04H4/129; E04H4/1281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-03-29 | 1946-09-28 | 1947-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-29 | 1950-09-28 | 1951-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-29 | 1954-09-28 | 1955-03-30 | $7700.00 | Window Closed / Lapsed |