US3290728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic pipe molding apparatus
Assignee: BABBITT PIPE CO Inc
•
Filing: 1964-02-10
•
Granted: 1966-12-13
•
Expires: 1984-02-10
Abstract
No abstract record available.
Inventors
- 👤 Robert C Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/44; B29C33/48; B29C33/50; B29C33/505; B29C49/00; B29C49/42; B29C49/44; B29C43/00; B29C43/02; B29C43/10; B29C43/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
40 words
A MANDREL FOR USE IN THE MOLDING OF PIPE COMPRIS ING A CYLINDRICAL CORE OF RIGID MATERIAL, A PLURALITY OF GROOVES EXTENDING FROM ONE END OF THE MANDREL TO THE OTHER, A SLEEVE COVERING THE MANDREL AND SECURED AT ITS
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |