Patent US2593010A successfully refreshed from Google Patents.
US2593010A
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Asbestos roofing felt and method of manufacture
Assignee: Johns Manville Corp
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Filing: 1948-12-04
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Granted: 1952-04-15
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Expires: 1968-12-04
Abstract
No abstract record available.
Inventors
- 👤 George W Clarvoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:05
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B30/00; C04B30/02; C04B41/45; C04B41/46; D; D06; D06M; D06M7/00; D06M7/005; C04B2111/00; C04B2111/00474; C04B2111/00482; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/31504; Y10T428/31652; Y10T442/00; Y10T442/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
IN MANUFACTURING A MULTI-PLY ASBESTOS ROOFING FELT THE STEPS COMPRISING, SATURATING BASE PLIES WITH AN ADHESIVE BITUMINOUS WATERPROOFING SATURANT, SATURATING A SURFACE PLY OF COMPARATIVELY WHITE POROUS ABSESTOS PAPER WITH STEARIC ACID DILUTED WITH A VOLATILE LIQUID, DRYING THE THUS SATURATED SURFACE PLY TO DRIVE OFF VOLATILES, APPLYING THE DRY SURFACE PLY AS A FACING TO THE SATURATED BASE PLIES AND CONSLIDATING UNDER PRESSURE TO DEVELOIP ADHESION, AND MOISTENING THE FACING SHEET OF THE THUS PLIED FELT WITH AN AQUE-
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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) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |