US3600225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe cleaning
Assignee: Rockwell Manufacturing Co
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Filing: 1968-09-19
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Granted: 1971-08-17
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Expires: 1988-09-19
Abstract
Abstract EQUIPMENT AND METHOD FOR CLEANING PIPES, PARTICULARLY SEWER LINES, IN WHICH THE CLEANING ACTION IS EFFECTED BY JETS OF WATER ISSUING FROM A SELF-PROPELLED NOZZLE. THE WATER FOR SUPPLYING THE JETS IS TAKEN FROM THE SEWER AND PUMPED UNDER HIGH PRESSURE TO THE NOZZLE AFTER THE REMOVAL AND COLLECTION OF GRITS AND OTHER FINES. D R A W I N G
Inventors
- 👤 Bruce R Parmelee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:53
CPC Classifications
E; E03; E03F; E03F9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |