US2979206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool filter
Assignee: Paddock Pool Equipment Co Inc
•
Filing: 1958-05-05
•
Granted: 1961-04-11
•
Expires: 1978-05-05
Abstract
No abstract record available.
Inventors
- 👤 Alfred Z Konopka
- 👤 Lightfoot Richard Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:29
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/12; E04H4/1209; E04H4/1272
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1139331A
Cited
GB348794A
Cited
US2579304A
Cited
US2701235A
Cited
US2809752A
Cited
US2844255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |