US2792862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical tile drill
Assignee: Cleveland Twist Drill Co
•
Filing: 1955-05-02
•
Granted: 1957-05-21
•
Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph V Emmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:38
CPC Classifications
B; B27; B27G; B27G15/00; B23; B23B; B23B51/00; B23B51/04; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/899; Y10T408/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB634350A
Cited
US2675841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |