Patent US2704520A successfully refreshed from Google Patents.
US2704520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for forming indentations in
Assignee: —
•
Filing: —
•
Granted: 1955-03-22
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Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:46
CPC Classifications
A; A23; A23G; A23G7/00; A23G7/0018; A23G3/00; A23G3/02; A23G3/0236; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0333; Y10T83/0363; Y10T83/037; Y10T83/0378
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1093380A
Cited
US1494263A
Cited
US1615198A
Cited
US1958144A
Cited
US2275714A
Cited
US2561231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-21 | 1958-09-20 | 1959-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-21 | 1962-09-20 | 1963-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-21 | 1966-09-20 | 1967-03-22 | $7700.00 | Window Closed / Lapsed |