US2720686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die casting apparatus
Assignee: General Dynamics Corp
•
Filing: 1952-09-12
•
Granted: 1955-10-18
•
Expires: 1972-09-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred P Higgins
- 👤 Garland R Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:33
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/20; B22D17/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US844460A
Cited
US1062288A
Cited
US1162246A
Cited
US1539691A
Cited
US1712287A
Cited
US1866682A
Cited
US1931769A
Cited
US2409779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |