Patent US2541631A successfully refreshed from Google Patents.
US2541631A
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US
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Process of producing an impregnated, waterproof, fibrous sheet
Assignee: Standard Oil Development Co
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Filing: 1944-07-29
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Granted: 1951-02-13
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Expires: 1964-07-29
Abstract
No abstract record available.
Inventors
- 👤 Charles M Baskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:26
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/01; D06M15/17; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/249921; Y10T428/249953; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/31504; Y10T428/31815; Y10T428/31819; Y10T428/31823
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
THE PROCESS OF PRODUCING AN IMPREGNATED, WATERPROOF, FIBROUS SHEET WHICH COMPRISES IMPREGNATING FIBROUS MATERIAL WITH A BITUMINOUS SATURANT, COATING THE SATURATED FIBROUS MATERIAL ON BOTH SIDES WITH PULVERIXED NORMALLY BRITTLE ASPHALT, PLACING THE IMPREGNATED PULVERIZED ASPHALT COATED FIBROUS MATERIAL ON A SURFACE AND TREATING THE PULVERIZED ASPHALT WITH A SOLVENT FLUX TO AMALGAMATE THE PULVERIZED ASPHALT.
Claim 2
Dependent Claim
56 words
THE PROCESS OF PRODUCING AN IMPREGNATED, WATERPROOF, FIBROUS SHEET WHICH COMPRISES IMPREGNATING FIBROUS MATERIAL WITH A BITUMINOUS SATURANT, COATING THE SATURATED FIBROUS MATERIAL ON BOTH SIDES WITH PULVERIXED NORMALLY BRITTLE ASPHALT, PLACING THE IMPREGNATED PULVERIZED ASPHALT COATED FIBROUS MATERIAL ON A SURFACE AND TREATING THE PULVERIZED ASPHALT WITH A SOLVENT FLUX TO AMALGAMATE THE PULVERIZED ASPHALT.
Claim 3
Dependent Claim
33 words
A WATERPROOF FIBROUS SHEET COMPOSITION HAVING A BASIS OF FIBROUS MATERIAL IMPREGNATED WITH A BITUMINOUS SATURANT AND HAVING APPLIED TO AT LEAST ONE SURFACE THEROF A SURFACE LAYER OF PULVERIZED NORMALLY BRITTLE ASPHALT.
Claim 4
Dependent Claim
33 words
A WATERPROOF FIBROUS SHEET COMPOSITION HAVING A BASIS OF FIBROUS MATERIAL IMPREGNATED WITH A BITUMINOUS SATURANT AND HAVING APPLIED TO AT LEAST ONE SURFACE THEROF A SURFACE LAYER OF PULVERIZED NORMALLY BRITTLE ASPHALT.
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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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |