US2834578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reamer
Assignee: Individual
•
Filing: 1955-09-12
•
Granted: 1958-05-13
•
Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 Charles J Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:45
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10; E21B21/103; E21B10/00; E21B10/26; E21B10/32; E21B10/322; E21B34/00; E21B34/06; E21B34/14; E21B34/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |