US2612343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible pipe puller
Assignee: TROJAN Manufacturing Co
•
Filing: 1949-06-06
•
Granted: 1952-09-30
•
Expires: 1969-06-06
Abstract
No abstract record available.
Inventors
- 👤 Frank L Fraizer
- 👤 Ernest H Waltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:17
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/046; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1558
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1698498A
Cited
US2056489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |