US3239894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starter-bar head with make-and-break joint
Assignee: United States Steel Corp
•
Filing: 1963-03-06
•
Granted: 1966-03-15
•
Expires: 1983-03-06
Abstract
No abstract record available.
Inventors
- 👤 Richard W Masters
- 👤 Andrew L Poulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:06
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2187720A
Cited
GB729359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |