Patent US3216958A successfully refreshed from Google Patents.
US3216958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coloring thermoset resins with metalloorganic compounds
Assignee: Bausch and Lomb Inc
•
Filing: 1960-05-31
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Granted: 1965-11-09
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Expires: 1980-05-31
Abstract
No abstract record available.
Inventors
- 👤 Clarence A Sheld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:29
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
METHOD OF INTNERNALLY COLORING A POLYMERIZED BODY, WHICH COMPRISES INCORPORATIONG BETWEEN 0.4 AND 34% BY WEIGHT OF AN ORGANIC COMPOUND OF A COLOR PRODUCING TRANSITION ELEMENT INTO A POLYMERIZABLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |