Patent US3309790A successfully refreshed from Google Patents.
US3309790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-weight dryer felt seams
Assignee: FABRIC RES LAB Inc
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Filing: 1964-10-02
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Granted: 1967-03-21
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Expires: 1984-10-02
Abstract
No abstract record available.
Inventors
- 👤 Donald G Macbean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:05
CPC Classifications
B; B65; B65H; B65H21/00; D; D21; D21F; D21F7/00; D21F7/08; D21F7/10; Y; Y10; Y10T; Y10T24/00; Y10T24/16; Y10T24/1608; Y10T24/164
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A LIGHTWEIGHT ENDLESS BELT FOR USE IN THE DRYER SECTIONS OF A PAPER MACHINE, THE SAID BELT FORMED FROM A LENGTH OF FABRIC HAVING AN OPEN WEAVE OF WARP AND WEFT STRANDS, THE SAID LENGTH OF FABRIC HAVING ITS ENDS JOINED TOGETHER TO FORM THE ENDLESS BELT, THE JOINT OF THE BELT COMPRISING FOLDED OVER END PORTIONS OF THE FABRIC STITCHED TO FORM LOOPS EXTENDING TRANSVERSELY OF THE FABRIC, THE SAID LOOPED PORTIONS OF THE FABRIC HAVING NOTCHED OUT PORTIONS FORMING A SERIES OF TRANSVERSELY SPACED APART LOOPED PROJECTIONS, THE PROJECTIONS IN ONE END OF THE FABRIC BEING STAGGERED IN RELATION TO THE PROJECTIONS OF THE OPPOSITE END OF THE FABRIC WITH THE PROJECTIONS IN ONE END OF THE FABRIC INTERLEAVING WITH THE NOTCHED OUT PORTIONS IN THE
Claim 2
Dependent Claim
128 words
A LIGHTWEIGHT ENDLESS BELT FOR USE IN THE DRYER SECTIONS OF A PAPER MACHINE, THE SAID BELT FORMED FROM A LENGTH OF FABRIC HAVING AN OPEN WEAVE OF WARP AND WEFT STRANDS, THE SAID LENGTH OF FABRIC HAVING ITS ENDS JOINED TOGETHER TO FORM THE ENDLESS BELT, THE JOINT OF THE BELT COMPRISING FOLDED OVER END PORTIONS OF THE FABRIC STITCHED TO FORM LOOPS EXTENDING TRANSVERSELY OF THE FABRIC, THE SAID LOOPED PORTIONS OF THE FABRIC HAVING NOTCHED OUT PORTIONS FORMING A SERIES OF TRANSVERSELY SPACED APART LOOPED PROJECTIONS, THE PROJECTIONS IN ONE END OF THE FABRIC BEING STAGGERED IN RELATION TO THE PROJECTIONS OF THE OPPOSITE END OF THE FABRIC WITH THE PROJECTIONS IN ONE END OF THE FABRIC INTERLEAVING WITH THE NOTCHED OUT PORTIONS IN THE
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) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |