US3547553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating surface skimmer
Assignee: Acme Products Inc
•
Filing: 1968-12-30
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Granted: 1970-12-15
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Expires: 1988-12-30
Abstract
No abstract record available.
Inventors
- 👤 Howard E Stanfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:35
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/70; F04D29/708; E; E02; E02B; E02B15/00; E02B15/04; E02B15/10; E02B15/106; F04D13/00; F04D13/02; F04D13/06; F04D13/066; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/923
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) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |