US2800302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auger head
Assignee: Austin Powder Co
•
Filing: 1952-01-23
•
Granted: 1957-07-23
•
Expires: 1972-01-23
Abstract
No abstract record available.
Inventors
- 👤 Mcclennan Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:01
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/62; E21B10/627; E21B10/633; E21B10/44; E21B10/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US140370A
Cited
US1228296A
Cited
US1486898A
Cited
US1443344A
Cited
US1593586A
Cited
US2010510A
Cited
US2504978A
Cited
GB639303A
Cited
US2701126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |