Patent US4681123A successfully refreshed from Google Patents.
US2948919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing extruded pipe under internal pressure
Assignee: Phillips Petroleum Co
•
Filing: 1957-10-28
•
Granted: 1960-08-16
•
Expires: 1977-10-28
Abstract
No abstract record available.
Inventors
- 👤 Robert W Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:10
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/16; B29; B29C; B29C48/00; B29C48/001; B29C48/0022; B29C2793/00; B29C2793/0027; B29C48/03; B29C48/09; Y; Y10; Y10S; Y10S264/00; Y10S264/50; Y10T; Y10T83/00; Y10T83/202; Y10T83/2022; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/4812; Y10T83/4815
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US712954A
Cited
US1370800A
Cited
US2293260A
Cited
US2377494A
Cited
US2325431A
Cited
US2663904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |