Patent US955845A successfully refreshed from Google Patents.
Patent US3203906A successfully refreshed from Google Patents.
US3203906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous shielding composition
Assignee: Berry Wiggins and Co Ltd
•
Filing: 1960-07-22
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Granted: 1965-08-31
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Expires: 1980-07-22
Abstract
No abstract record available.
Inventors
- 👤 Evans Arthur
- 👤 Rosenfelder Walter Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:30
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/02; G21F1/10; C; C08; C08K; C08K5/00; C08K5/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A COMPOSITION CONSISTING ESSENTIALLY OF BITUMEN HAVING A HAVING A HYDROGEN CONTENT OF AT LEAST ABOUT 8 PERCENT BY WEIGHT OBTAINED AS THE END PRODUCT OF DISTILLATION OF PETROLEUM OIL AND AN ORGANIC ESTER OF BORIC ACID DISSOLVED IN SAID BITUMEN.
Claim 2
Dependent Claim
41 words
A COMPOSITION CONSISTING ESSENTIALLY OF BITUMEN HAVING A HAVING A HYDROGEN CONTENT OF AT LEAST ABOUT 8 PERCENT BY WEIGHT OBTAINED AS THE END PRODUCT OF DISTILLATION OF PETROLEUM OIL AND AN ORGANIC ESTER OF BORIC ACID DISSOLVED IN SAID BITUMEN.
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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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |