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US2446964A
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US
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Sewer mole
Assignee: Individual
•
Filing: 1944-06-26
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Granted: 1948-08-10
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Expires: 1964-06-26
Abstract
No abstract record available.
Inventors
- 👤 Stone Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:53
CPC Classifications
E; E03; E03F; E03F9/00; E03F9/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US916654A
Cited
US1212707A
Cited
US1173642A
Cited
US1915679A
Cited
US2201733A
Cited
US2275850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |