US2740212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rooter tooth assembly
Assignee: Individual
•
Filing: 1955-09-30
•
Granted: 1956-04-03
•
Expires: 1975-09-30
Abstract
No abstract record available.
Inventors
- 👤 Dwight E Werkheiser
- 👤 Erwin L Brautigam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:49
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/28; E02F9/2866; E02F9/2808; E02F9/2816; E02F9/2825
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1519101A
Cited
US2040085A
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US2305425A
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US2385395A
Cited
US2397521A
Cited
US2483032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |