US2853397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the fastness to light of colored lacquers and the products thereof
Assignee: Bayer AG
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Filing: 1952-04-23
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Granted: 1958-09-23
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Expires: 1972-04-23
Abstract
No abstract record available.
Inventors
- 👤 Seibert Heinrich
- 👤 Bayer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:40
CPC Classifications
C; C09; C09D; C09D193/00; C09D193/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
41 words
THE PROCESS OF MANUFACTRING IMPROVED ORGANIC DYESTUFF COLORED LACQYUERS WHICH COMPRISES INCORPOATING N-SUBSTITUTED URETHANES OF THE GROUP CONSISTING OF POLYURETHANES CONTAINING AT LEAST 2 URETHANE GROUPS PER MOLECULE AND URETHANES HAVING AT LEST 1 UNRETHANE GROUP BOUND TO A CYLIC RADICAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |