Patent US3609819A successfully refreshed from Google Patents.
US3609819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moulding apparatus
Assignee: Dunlop Co Ltd
•
Filing: 1968-11-04
•
Granted: 1971-10-05
•
Expires: 1988-11-04
Abstract
Abstract AN MULTI-PIECE MOULD E.G. A SEGMENTED TIRE MOULD, HAVING A PLURALITY OF MALTING SURFACES FOR SEALED ENGAGEMENT ONE WITH ANOTHER WHEN THE MOULD IS ASSEMBLED, SOME AT LEAST OF SAID SURFACES BEING RELATIVELY DISPOSED AT DIFFERENT ANGULAR RELATIONSHIPS TO ONE ANOTHER AND AT LEAST ONE OF SAID SURFACES BEING FORMED OF A MATERIAL OF RELA- TIVELY GREATER COMPRESSIBILITY, AND, PERHAPS ADDITIONALLY OF RELATIVELY SMALLER CO-EFFICIENT OF FRICTION, THAN THE MATERIAL OF THE OTHER MATING SURFACES.
Inventors
- 👤 Eric H Searle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:14
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0606; B29D30/0629; Y; Y10; Y10S; Y10S425/00; Y10S425/055
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |