Patent US2979733A successfully refreshed from Google Patents.
US2979733A
Expired / Lapsed
US
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Swimming pool cleaning method and apparatus
Assignee: Individual
•
Filing: 1960-01-18
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Granted: 1961-04-18
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Expires: 1980-01-18
Abstract
No abstract record available.
Inventors
- 👤 Clair Maurice W Saint
- 👤 Park Apt B Menlo
- 👤 Robert S Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:43
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; E04H4/1681; Y; Y10; Y10S; Y10S4/00; Y10S4/09; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86236; Y10T137/86244
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |