US3372809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool surface skimmer
Assignee: CARROLL F SPITZER
•
Filing: 1965-04-29
•
Granted: 1968-03-12
•
Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 Carroll F Spitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:26
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/12; E04H4/1209; E04H4/1272
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |