US3171150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drainpipe cleaning apparatus
Assignee: Individual
•
Filing: 1963-05-22
•
Granted: 1965-03-02
•
Expires: 1983-05-22
Abstract
No abstract record available.
Inventors
- 👤 Hubert M Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:44
CPC Classifications
E; E03; E03F; E03F9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733767A
Cited
US841917A
Cited
US949637A
Cited
US940150A
Cited
US1047939A
Cited
US1383291A
Cited
US1547440A
Cited
US2232018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |