US2567554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Straightedge construction
Assignee: Eugene Dietzgen Co
•
Filing: 1947-06-11
•
Granted: 1951-09-11
•
Expires: 1967-06-11
Abstract
No abstract record available.
Inventors
- 👤 Clarence P Davey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:11
CPC Classifications
B; B43; B43L; B43L7/00; F; F16; F16B; F16B5/00; F16B5/0004; F16B5/0008; F16B5/0028; Y; Y10; Y10T; Y10T403/00; Y10T403/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1216468A
Cited
US1398852A
Cited
US1768679A
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US1818404A
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US1984273A
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US2366449A
Cited
US2379179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |