US2988348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary tunneling machines
Assignee: Goodman Manufacturing Co LP
•
Filing: 1957-07-11
•
Granted: 1961-06-13
•
Expires: 1977-07-11
Abstract
No abstract record available.
Inventors
- 👤 James S Robbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:27
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/1093; E21D9/11; E21D9/112
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US368883A
Cited
US1001903A
Cited
US1353908A
Cited
US1645007A
Cited
US1870906A
Cited
US2384397A
Cited
US2693950A
Cited
US2775439A
Cited
US2756036A
Cited
US2756034A
Cited
US2798707A
Cited
DE944001C
Cited
US2756037A
Cited
US2760766A
Cited
US2859022A
Cited
US2864600A
Cited
US2837325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |