US3136022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint forming device
Assignee: Rotuba Extruders Inc
•
Filing: 1960-12-12
•
Granted: 1964-06-09
•
Expires: 1980-12-12
Abstract
No abstract record available.
Inventors
- 👤 Martin R Dohren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:01
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/02; E01C23/021
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1768838A
Cited
US1697563A
Cited
US1850512A
Cited
GB483880A
Cited
US2699128A
Cited
US2803858A
Cited
FR1130844A
Cited
US2878845A
Cited
US2834198A
Cited
US3052945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |