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
2026-11-04 22:08
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/02; E01C23/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1768838A
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US1697563A
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US1850512A
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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 |