US2898788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming a boiler head or the like
Assignee: Wheeling Steel Corp
•
Filing: 1956-12-20
•
Granted: 1959-08-11
•
Expires: 1976-12-20
Abstract
No abstract record available.
Inventors
- 👤 James F Baxa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:33
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/29; B21C37/292; B21D; B21D19/00; B21D19/08; B21D53/00; B21D53/02; F; F22; F22G; F22G3/00; F22G3/009
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |