Patent US2661489A successfully refreshed from Google Patents.
US2661489A
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Pipe cleaning apparatus
Assignee: SPARTAN TOOL Co
•
Filing: 1949-04-19
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Granted: 1953-12-08
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Expires: 1969-04-19
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Rudolph
- 👤 John V O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:25
CPC Classifications
E; E03; E03F; E03F9/00; E03F9/002; E03F9/005; F; F16; F16L; F16L2101/00; F16L2101/10; F16L2101/12; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17128; Y10T279/17171; Y10T279/17179; Y10T279/17188; Y10T279/17196; Y10T279/17666; Y10T279/17692; Y10T279/17743; Y10T279/17752
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1130358A
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US1568094A
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US1842166A
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US2272387A
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US2275269A
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US2355733A
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US2488490A
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US2470225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |