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US2542597A
Expired / Lapsed
US
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Urethanes of 2-naphthyl j acid and their brominated derivatives
Assignee: GAF Chemicals Corp
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Filing: 1948-04-24
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Granted: 1951-02-20
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Expires: 1968-04-24
Abstract
No abstract record available.
Inventors
- 👤 Tulagin Vsevolod
- 👤 Willy A Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:54
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF THOSE OF THE FOLLOWING STRUCTURAL FORMULA:
Claim 2
Dependent Claim
13 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF THOSE OF THE FOLLOWING STRUCTURAL FORMULA:
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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |