Patent US2698788A successfully refreshed from Google Patents.
US2698788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubberized fibrous sheet and method of making the same
Assignee: Rogers Corp
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Filing: 1952-02-27
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Granted: 1955-01-04
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Expires: 1972-02-27
Abstract
No abstract record available.
Inventors
- 👤 Norman L Greenman
- 👤 Richard C Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:38
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A FLEXIBLE GASKET MATERIAL COMPRISING A VULCANIZED FELTED RUBBERIZED FIBROUS SHEET CONSISTING OF MINERAL FIBERS IN THE PROPORTION OF FROM ABOUT 80 TO 100 PARTS BY WEIGHT; CELLULOSIC FIBERS IN A PROPORTION UP TO ABOUT 20 PARTS BY WEIGHT; A VULCANIZABLE RUBBER IN THE PROPORTION OF ABOUT 10 TO 35 PARTS BY WEIGHT; AND "A BEATER ADDITION" SYNTHETIC RESIN IN A PROPORTION UP TO ABOUT 10 PARTS BY WEIGHT, THE INDIVIDUAL MINERAL AND CELLULOSIC FIBERS BEING SURROUNDED BY CURED RUBBER AND VULCANIZED TOGETHER AND IMPARTING A RUBBER FEEL TO THE SHEET, SAID GASKET MATERIAL BEING CHARACTERIZED BY DENSITIES WITHIN THE RANGE OF FROM .8 TO 1.6 GRAMS PER CUBIC CENTIMETER, AND BY A VARIATION IN TENSILE STRENGTH OF FROM ABOUT 1000 TO 3000 POUNDS PER SQUARE INCH WHEN MEASURED IN ONE DIRECTION, AND FROM ABOUT 2000 TO 6000 POUNDS PER SQUARE INCH WHEN MEASURED IN A DIRECTION AT RIGHT ANGLES TO SAID ONE DIRECTION.
Claim 2
Dependent Claim
154 words
A FLEXIBLE GASKET MATERIAL COMPRISING A VULCANIZED FELTED RUBBERIZED FIBROUS SHEET CONSISTING OF MINERAL FIBERS IN THE PROPORTION OF FROM ABOUT 80 TO 100 PARTS BY WEIGHT; CELLULOSIC FIBERS IN A PROPORTION UP TO ABOUT 20 PARTS BY WEIGHT; A VULCANIZABLE RUBBER IN THE PROPORTION OF ABOUT 10 TO 35 PARTS BY WEIGHT; AND "A BEATER ADDITION" SYNTHETIC RESIN IN A PROPORTION UP TO ABOUT 10 PARTS BY WEIGHT, THE INDIVIDUAL MINERAL AND CELLULOSIC FIBERS BEING SURROUNDED BY CURED RUBBER AND VULCANIZED TOGETHER AND IMPARTING A RUBBER FEEL TO THE SHEET, SAID GASKET MATERIAL BEING CHARACTERIZED BY DENSITIES WITHIN THE RANGE OF FROM .8 TO 1.6 GRAMS PER CUBIC CENTIMETER, AND BY A VARIATION IN TENSILE STRENGTH OF FROM ABOUT 1000 TO 3000 POUNDS PER SQUARE INCH WHEN MEASURED IN ONE DIRECTION, AND FROM ABOUT 2000 TO 6000 POUNDS PER SQUARE INCH WHEN MEASURED IN A DIRECTION AT RIGHT ANGLES TO SAID ONE DIRECTION.
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) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |