US2689841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber compositions and vulcanized rubber products made therefrom
Assignee: TERRES DECOLORANTES FRANCAISES
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Filing: 1951-04-03
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Granted: 1954-09-21
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Expires: 1971-04-03
Abstract
No abstract record available.
Inventors
- 👤 Augustin Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:18
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/346
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A RUBBER MIX CONTAINING, IN ADDITION TO THE RUBBER AND AS A REINFORCING FILLER, A CHEMICALLY UNMODIFIED CRYPTOCRYSTALLINE CLAY SELECTED FROM THE GROUP CONSISTING OF HALLOYSITE, MICROKAOLINITE, ALLOPHANE AND ATTAPULGITE WHEREOF THE MEAN PARTICLE DIAMETER IS LESS THAN ABUT 200 MILLIMICRONS AND NO SUBSTANTIAL PROPORTION OF PARTICLES HAVE A DIAMETER EQUAL TO OR GREATER THAN 500 MILLIMICRONS.
Claim 2
Dependent Claim
57 words
A RUBBER MIX CONTAINING, IN ADDITION TO THE RUBBER AND AS A REINFORCING FILLER, A CHEMICALLY UNMODIFIED CRYPTOCRYSTALLINE CLAY SELECTED FROM THE GROUP CONSISTING OF HALLOYSITE, MICROKAOLINITE, ALLOPHANE AND ATTAPULGITE WHEREOF THE MEAN PARTICLE DIAMETER IS LESS THAN ABUT 200 MILLIMICRONS AND NO SUBSTANTIAL PROPORTION OF PARTICLES HAVE A DIAMETER EQUAL TO OR GREATER THAN 500 MILLIMICRONS.
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) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |