US2932837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conduit cleaning device
Assignee: TD Williamson Inc
•
Filing: 1953-12-01
•
Granted: 1960-04-19
•
Expires: 1973-12-01
Abstract
No abstract record available.
Inventors
- 👤 Nooy Burton Ver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:51
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0553
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US451841A
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US582953A
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US274756A
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US695828A
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GB190522072A
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US1676825A
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US1863950A
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US2141491A
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US2474690A
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US2455273A
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US2447966A
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US2623473A
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AT162130B
Cited
US2518330A
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US2636202A
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US2688218A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |