US2472309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool apparatus
Assignee: Individual
•
Filing: 1945-09-14
•
Granted: 1949-06-07
•
Expires: 1965-09-14
Abstract
No abstract record available.
Inventors
- 👤 Earl J Opsahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:48
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/12; E04H4/1209; B; B01; B01D; B01D24/00; B01D24/02; B01D24/10; B01D24/12; B01D24/46; B01D24/4631; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US883467A
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US1563851A
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US1947594A
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US1792245A
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US1762366A
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US1976168A
Cited
DE673823C
Cited
DE653013C
Cited
GB474886A
Cited
US2231460A
Cited
US2347092A
Cited
US2324904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |