US2691503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine prop
Assignee: Goodman Manufacturing Co LP
•
Filing: 1950-03-18
•
Granted: 1954-10-12
•
Expires: 1970-03-18
Abstract
No abstract record available.
Inventors
- 👤 Roy S Bigelow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:59
CPC Classifications
E; E21; E21D; E21D15/00; E21D15/14; E21D15/15; E21D15/44; E21D15/45; E21D15/58; E21D15/585; E21D15/586
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US637945A
Cited
US1922401A
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US1877364A
Cited
US2151057A
Cited
US2584015A
Cited
US2465653A
Cited
US2461810A
Cited
US2503659A
Cited
US2520686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |