US2794622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holder for self-drilling expansion shells and the like
Assignee: Phillips Drill Co Inc
•
Filing: 1953-07-08
•
Granted: 1957-06-04
•
Expires: 1973-07-08
Abstract
No abstract record available.
Inventors
- 👤 John H Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:57
CPC Classifications
F; F16; F16B; F16B13/00; F16B13/002; B; B25; B25D; B25D17/00; B25D17/005; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/96; Y10T; Y10T403/00; Y10T403/55; Y10T403/556; Y10T403/557
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |