US3085892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint sealant for gas mains
Assignee: Washington Gas Light Co
•
Filing: 1960-09-30
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Granted: 1963-04-16
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Expires: 1980-09-30
Abstract
No abstract record available.
Inventors
- 👤 White Donald Lloyd
- 👤 Jr Harry Lorain Ketcham
- 👤 Horn Howell Farley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:56
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A SEALANT FOR REWORKING THE JOINTS OF IN-PLACE, CASTIRON GAS MAINS TO ELIMINATE LEAKAGE THROUGH THE JOINT PACKING MATERIAL CONSISTING OF A MIXTURE BY VOLUME OF: 40% TO 50% OFCOAL TAR ENAMEL, 30% TO 40% OF OIL GAS TAR, 8% TO 15% OF NONOCHLOROBENZENE, AND 8% TO 15% OF BENZENE, SAID COAL TAR ENAMEL CONSISTING ESSENTIALLY OF ABOUT 50% COAL TAR PITCH, ABOUT 25% HYDROUS MAGNESIUM AND ALUMINUM SILICATES AND THE BALANCE TO MAKE 100% BY WEIGHT SUBSTANTIALLY EVENLY DIVIDED BETWEEN HEAVY AROMATIC OIL AND FINELY DIVIDED MEDIUM VOLATILE COAL.
Claim 2
Dependent Claim
90 words
A SEALANT FOR REWORKING THE JOINTS OF IN-PLACE, CASTIRON GAS MAINS TO ELIMINATE LEAKAGE THROUGH THE JOINT PACKING MATERIAL CONSISTING OF A MIXTURE BY VOLUME OF: 40% TO 50% OFCOAL TAR ENAMEL, 30% TO 40% OF OIL GAS TAR, 8% TO 15% OF NONOCHLOROBENZENE, AND 8% TO 15% OF BENZENE, SAID COAL TAR ENAMEL CONSISTING ESSENTIALLY OF ABOUT 50% COAL TAR PITCH, ABOUT 25% HYDROUS MAGNESIUM AND ALUMINUM SILICATES AND THE BALANCE TO MAKE 100% BY WEIGHT SUBSTANTIALLY EVENLY DIVIDED BETWEEN HEAVY AROMATIC OIL AND FINELY DIVIDED MEDIUM VOLATILE COAL.
References Cited (Backward Citations)
US2446903A
Cited
US2894848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |