Patent US3493116A successfully refreshed from Google Patents.
US3493116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool filter
Assignee: SWIMRITE Mfg CO Inc
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Filing: 1969-02-10
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Granted: 1970-02-03
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Expires: 1989-02-10
Abstract
No abstract record available.
Inventors
- 👤 James R Edmiston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:04
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/46; B01D24/4631; B01D24/28; B01D24/32; B01D24/02; B01D24/10; B01D24/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2529398A
Cited
US967554A
Cited
US1015051A
Cited
US1205743A
Cited
US2043734A
Cited
US2458893A
Cited
US2874847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |