US2767990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable punch retainer
Assignee: ENGINEERING SERVICE
•
Filing: 1954-08-09
•
Granted: 1956-10-23
•
Expires: 1974-08-09
Abstract
No abstract record available.
Inventors
- 👤 Jr William E Jewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:02
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/34; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T279/17786; Y10T403/00; Y10T403/60; Y10T403/606; Y10T83/00; Y10T83/929; Y10T83/9457; Y10T83/9461; Y10T83/9473; Y10T83/9476
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1354549A
Cited
US1974464A
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US2153950A
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US2171361A
Cited
US2215015A
Cited
US2309713A
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US2496700A
Cited
US2479150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |