US3221869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor belt
Assignee: CLOUTH RHEIN GUMMIWARENFABRIK
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Filing: 1961-12-28
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Granted: 1965-12-07
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Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Paasche Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:31
CPC Classifications
B; B65; B65G; B65G15/00; B65G15/30; B65G15/32; B65G15/34; B65G15/36; B65G2201/00; B65G2201/04; D; D07; D07B; D07B1/00; D07B1/22; D07B2501/00; D07B2501/20; D07B2501/2076; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24132; Y10T428/24942
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
A CONVEYOR BELT, COMPRISING, IN COMBINATION, A PLURALITY OF METAL CABLES ARRANGED SUBSTANTIALLY PARALLEL TO EACH OTHER; A SUBSTANTIALLY STRIP-SHAPED FIRST RUBBER LAYER HAVING TWO OPPOSITE FACES, FIRMLY ADHERING TO AND COVERING SAID METAL CABLES; AT LEAST ONE SECOND RUBBER LAYER HAVING A HIGH TEAR RESISTANCE COVERING AND FIRMLY ADHERING TO AT LEAST ONE FACE OF SAID FIRST RUBBER LAYER; AND AT LEAST ONE THIRD RUBBER LAYER HAVING A HIGH ABRASION RESISTANCE GREATER THAN THE ABRASION RESISTANCE OF SAID SECOND RUBBER LAYER AND A TEAR RESISTANCE LOWER THAN THE TEAR RESISTANCE OF SAID SECOND RUBBER LAYER HAVING AN OUTER SURFACE CONSTITUTING THE LOAD-CARRYING FACE OF THE BELT, THE OPPOSITE SURFACE OF SAID THIRD RUBBER LAYER FIRMLY ADHERING TO AND COVERING AT LEAST THE FREE FACE OF SAID SECOND RUBBER LAYER, SAID METAL CABLES FORMING THE ONLY REINFORCING ELEMENT OF SAID CONVEYOR BELT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |