US3489447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical anvil cap or die key
Assignee: Chambersburg Engineering Co
•
Filing: 1968-06-28
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Granted: 1970-01-13
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Expires: 1988-06-28
Abstract
No abstract record available.
Inventors
- 👤 Henry Anton Weyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:46
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/02; B21J13/03; F; F16; F16B; F16B2200/00; F16B2200/69; F16B2200/73; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7062; Y10T403/7064; Y10T403/7066; Y10T403/7067
Claims Analysis
Total Claims: 0
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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) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |