US3424647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated vapor barrier sheet material
Assignee: PHILIP CAREY CORP
•
Filing: 1963-12-20
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Granted: 1969-01-28
•
Expires: 1983-12-20
Abstract
No abstract record available.
Inventors
- 👤 Howard Edward Callahan
- 👤 Ralph John O'connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:52
CPC Classifications
E; E04; E04D; E04D5/00; E04D5/10; B; B32; B32B; B32B27/00; E04B; E04B1/00; E04B1/62; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31652; Y10T428/31815; Y10T442/00; Y10T442/50; Y10T442/56; Y10T442/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A LAMINATED VAPOR BARRIER SHEET MATERIAL HAVING HIGH RESISTANCE TO MOISTURE VAPOR TRANSMISSION AND TO DETERIORATION BY MOISTURE AND MOIST EARTH, COMPRISING A LAYER OF BITUMINOUS MASTIC ENCASED BETWEEN SHEETS OF BITUMEN-SATURATED ASBESTOS FELT, THE OUTER EXPOSED SURFACES OF SAID ASBESTOS FELT SHEETS BEING COATED AND SEALED WITH A THIN LAYER OF A BITUMINOUS COATING, AND SAID COATED SURFACES HAVING A THIN LAYER OF ANTI-STICK MATERIAL THEREON, SAID VAPOR BARRIER SHEET BEING CHARACTERIZED BY HIGH STRENGTH, TOUGHNESS, SUFFICIENT PLIABILITY TO CONFORM TO IRREGULARITIES OF EARTH CONTOURS, AND HIGH RETENTION OF MOISTURE VAPOR TRANSMISSION RESISTANCE, INTEGRITY AND STRENGTH DURING PROLONGED EXPOSURE TO MOISTURE AND TO CONTACT WITH MOIST SOIL.
Claim 2
Dependent Claim
108 words
A LAMINATED VAPOR BARRIER SHEET MATERIAL HAVING HIGH RESISTANCE TO MOISTURE VAPOR TRANSMISSION AND TO DETERIORATION BY MOISTURE AND MOIST EARTH, COMPRISING A LAYER OF BITUMINOUS MASTIC ENCASED BETWEEN SHEETS OF BITUMEN-SATURATED ASBESTOS FELT, THE OUTER EXPOSED SURFACES OF SAID ASBESTOS FELT SHEETS BEING COATED AND SEALED WITH A THIN LAYER OF A BITUMINOUS COATING, AND SAID COATED SURFACES HAVING A THIN LAYER OF ANTI-STICK MATERIAL THEREON, SAID VAPOR BARRIER SHEET BEING CHARACTERIZED BY HIGH STRENGTH, TOUGHNESS, SUFFICIENT PLIABILITY TO CONFORM TO IRREGULARITIES OF EARTH CONTOURS, AND HIGH RETENTION OF MOISTURE VAPOR TRANSMISSION RESISTANCE, INTEGRITY AND STRENGTH DURING PROLONGED EXPOSURE TO MOISTURE AND TO CONTACT WITH MOIST SOIL.
References Cited (Backward Citations)
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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) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |