US2861894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal tar soft pitch product
Assignee: Gesellschaft fuer Teerverwertung mbH
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Filing: 1955-07-05
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Granted: 1958-11-25
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Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 Franck Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:32
CPC Classifications
C; C10; C10C; C10C1/00; C10C1/005; C10C3/00; C10C3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
SOFT PITCH PRODUCT HOMOGENEOUSLY MISCIBLE IN ALL PROPORTIONS WITH DISTILLED BITUMEN, SAID PITCH PRODUCT CONSISTING ESSENTIALLY OF A MIXTURE OF COAL TAR PITCH WITH A SOFTENING POINT OF ABOUT 70*C., AND A COAL TAR OIL FRACTION CONSISTING ESSENTIALLY OF QUADRINUCLEAR AROMATIC COAL TAR COMPONENTS, SAID SOFT PITCH PRODUCT HAVING A SOFTENING POINT LOWER THAN ABOUT 40*C.
Claim 2
Dependent Claim
56 words
SOFT PITCH PRODUCT HOMOGENEOUSLY MISCIBLE IN ALL PROPORTIONS WITH DISTILLED BITUMEN, SAID PITCH PRODUCT CONSISTING ESSENTIALLY OF A MIXTURE OF COAL TAR PITCH WITH A SOFTENING POINT OF ABOUT 70*C., AND A COAL TAR OIL FRACTION CONSISTING ESSENTIALLY OF QUADRINUCLEAR AROMATIC COAL TAR COMPONENTS, SAID SOFT PITCH PRODUCT HAVING A SOFTENING POINT LOWER THAN ABOUT 40*C.
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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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |