Patent US2446672A successfully refreshed from Google Patents.
US2446672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of machining article blanks
Assignee: AT&T Inc
•
Filing: 1944-07-26
•
Granted: 1948-08-10
•
Expires: 1964-07-26
Abstract
No abstract record available.
Inventors
- 👤 Sirp Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/02; B23Q3/06; B23Q3/08; B23Q3/086; B23P; B23P25/00; H; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/49941; Y10T29/4998; Y10T29/49988; Y10T29/49989; Y10T409/00; Y10T409/30; Y10T409/303752
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) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |