US3270476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating board
Assignee: Johns Manville Corp
•
Filing: 1962-01-22
•
Granted: 1966-09-06
•
Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 Richard H Enslen
- 👤 Edward M Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:19
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/35; E04D3/351; D; D21; D21J; D21J1/00; D21J1/16; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/161; Y10T428/19; Y10T428/192; Y10T428/195; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24421; Y10T428/2443; Y10T428/31504; Y10T428/31815; Y10T428/31819
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A ROOF COVERING COMPRISING A ROOF BASE, A PLURALITY OF CELLULOSIC FIBERBOARDS ON SAID ROOF BASE, SAID FIBERBOARDS BEING JUXTAPOSITIONED TO FORM A RELATIVELY CONTINUOUS SURFACE, SAID FIBERBOARDS HAVING A DENSITY BETWEEN APPROXIMATELY 10-15 POUNDS PER CUBIC FOOT, EACH FIBERBOARD HAVING A COATING MIXTURE OF CLAY AND AN ASPHALTIC SUBSTANCE INTEGRALLY BONDED TO THE UPPER MAJOR SURFACE THEREOF, A BUILT-UP ROOF COVERING ON SAID MAJOR SURFACES OF THE FIBERBOARDS, SAID COVERING BEING ADHERED TO THE MAJOR SURFACES BY A BITUMINOUS COMPOSITION.
Claim 2
Dependent Claim
81 words
A ROOF COVERING COMPRISING A ROOF BASE, A PLURALITY OF CELLULOSIC FIBERBOARDS ON SAID ROOF BASE, SAID FIBERBOARDS BEING JUXTAPOSITIONED TO FORM A RELATIVELY CONTINUOUS SURFACE, SAID FIBERBOARDS HAVING A DENSITY BETWEEN APPROXIMATELY 10-15 POUNDS PER CUBIC FOOT, EACH FIBERBOARD HAVING A COATING MIXTURE OF CLAY AND AN ASPHALTIC SUBSTANCE INTEGRALLY BONDED TO THE UPPER MAJOR SURFACE THEREOF, A BUILT-UP ROOF COVERING ON SAID MAJOR SURFACES OF THE FIBERBOARDS, SAID COVERING BEING ADHERED TO THE MAJOR SURFACES BY A BITUMINOUS COMPOSITION.
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |