US2546975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion device
Assignee: STC PLC
•
Filing: 1946-10-18
•
Granted: 1951-04-03
•
Expires: 1966-10-18
Abstract
No abstract record available.
Inventors
- 👤 Frank J Churnell
- 👤 Kenneth E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:06
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/03; B29C48/06; B29C48/15; B29C48/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US37112A
Cited
US574577A
Cited
FR615976A
Cited
US1649892A
Cited
US1862947A
Cited
FR709001A
Cited
US2235688A
Cited
US2345086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |