Patent US2564786A successfully refreshed from Google Patents.
US2564786A
Expired / Lapsed
US
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Drilling jig for angle irons
Assignee: AT&T Inc
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Filing: 1947-11-04
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Granted: 1951-08-21
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Expires: 1967-11-04
Abstract
No abstract record available.
Inventors
- 👤 Carl B Lubbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:12
CPC Classifications
B; B23; B23B; B23B47/00; B23B47/28; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/561; Y10T408/5623; Y10T408/56245; Y10T408/563; Y10T408/567
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1579284A
Cited
DE603023C
Cited
US2367582A
Cited
US2342059A
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US2438162A
Cited
US2389184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |