US3459253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of casting pistons
Assignee: Wellworthy Ltd
•
Filing: 1965-03-19
•
Granted: 1969-08-05
•
Expires: 1985-03-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur John Woolcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:35
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C7/00; B22C7/02; B22C9/10; B22C9/105; B22D; B22D15/00; B22D15/02; B22D29/00; B22D29/001; B22D29/002; F; F02; F02F; F02F3/00; F16; F16J; F16J1/00; F16J1/001
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |