Patent US3137020A successfully refreshed from Google Patents.
US3137020A
Expired / Lapsed
US
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Rotary brush section
Assignee: PPG Industries Inc
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Filing: 1961-05-23
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Granted: 1964-06-16
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Expires: 1981-05-23
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Tilgner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:00
CPC Classifications
A; A46; A46B; A46B13/00; A46B13/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A ROTARY BURSH SECTION COMPRISING A MONOLITHIC CHANNEL BACKING RING HAVING SUBSTANTIALLY PARALLEL SIDES AND HAVING DOUBLED FILL MATERIAL DISPOSED THEREIN, AND AT LEAST ONE TURN OF A CORD OF ELASTOMERIC SYNTHETIC PLASTIC MATERIAL DISPOSED IN THE BIGHT PORTIONS OF THE DOUBLED-FILL MATERIAL AND BEING SECURED AT ITS END TO THE CHANNEL BACKING RING AND EXTENDING THROUGH THE LAYER OF FILL MATERIALS, THE CORD BEING STRETCHED ABOUT 5 PERCENT TO ABOUT 40 PERCENT AND THE CORD BEING SECURED BY MEANS ACTING TRANSVERSELY OF THE CORD TO PREVENT SLIPPAGE OF THE CORD UPON ITSELF.
Claim 2
Dependent Claim
93 words
A ROTARY BURSH SECTION COMPRISING A MONOLITHIC CHANNEL BACKING RING HAVING SUBSTANTIALLY PARALLEL SIDES AND HAVING DOUBLED FILL MATERIAL DISPOSED THEREIN, AND AT LEAST ONE TURN OF A CORD OF ELASTOMERIC SYNTHETIC PLASTIC MATERIAL DISPOSED IN THE BIGHT PORTIONS OF THE DOUBLED-FILL MATERIAL AND BEING SECURED AT ITS END TO THE CHANNEL BACKING RING AND EXTENDING THROUGH THE LAYER OF FILL MATERIALS, THE CORD BEING STRETCHED ABOUT 5 PERCENT TO ABOUT 40 PERCENT AND THE CORD BEING SECURED BY MEANS ACTING TRANSVERSELY OF THE CORD TO PREVENT SLIPPAGE OF THE CORD UPON ITSELF.
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |