Patent US2398318A successfully refreshed from Google Patents.
US2398318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for plastic injection
Assignee: Hydraulic Development Corp Inc
•
Filing: 1943-06-12
•
Granted: 1946-04-09
•
Expires: 1963-06-12
Abstract
No abstract record available.
Inventors
- 👤 Howard F Macmillin
- 👤 George A Waldie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:44
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/72
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-04-08 | 1949-10-08 | 1950-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-08 | 1953-10-08 | 1954-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-08 | 1957-10-08 | 1958-04-09 | $7700.00 | Window Closed / Lapsed |