US2789204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for hot forming material
Assignee: Lockheed Martin Corp
•
Filing: 1954-09-30
•
Granted: 1957-04-16
•
Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 Robert H Kilpatrick
- 👤 Frank A Stovall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:20
CPC Classifications
B; B21; B21D; B21D37/00; B21D37/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |