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US2506669A
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US
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Drainpipe stoppage preventer
Assignee: Individual
•
Filing: 1947-06-13
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Granted: 1950-05-09
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Expires: 1967-06-13
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Heuacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:49
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/26; E03C1/264; Y; Y10; Y10S; Y10S4/00; Y10S4/14
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) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |