Patent US2845658A successfully refreshed from Google Patents.
US2845658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible mandrel for use in fabricating plastic pipe
Assignee: Individual
•
Filing: 1954-01-28
•
Granted: 1958-08-05
•
Expires: 1974-01-28
Abstract
No abstract record available.
Inventors
- 👤 Leroy H Knibb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:59
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/82; B29C53/821; B29C53/824; B29C33/00; B29C33/44; B29C33/48; B29C33/485; B29K; B29K2309/00; B29K2309/08; B29L; B29L2023/00; B29L2023/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US314387A
Cited
US823141A
Cited
US811310A
Cited
FR385495A
Cited
US910578A
Cited
US1172600A
Cited
GB159209A
Cited
US1676325A
Cited
FR589772A
Cited
FR677172A
Cited
US1837092A
Cited
US2456513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |