US2090356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular cutting or bore hole enlarging apparatus
Assignee: Chicago Pneumatic Tool Co LLC
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Filing: 1935-02-23
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Granted: 1937-08-17
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Expires: 1955-02-23
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:20
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-08-16 | 1941-02-15 | 1941-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-16 | 1945-02-15 | 1945-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-16 | 1949-02-15 | 1949-08-17 | $7700.00 | Window Closed / Lapsed |