Patent US2937186A successfully refreshed from Google Patents.
US2937186A
Expired / Lapsed
US
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Isothiocyanate compounds and means of producing the same
Assignee: University of Kansas Center for Research Inc (KUCR)
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Filing: 1958-04-29
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Granted: 1960-05-17
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Expires: 1978-04-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Burckhalter
- 👤 Robert J Seiwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:17
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/90; Y; Y10; Y10S; Y10S436/00; Y10S436/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
AS A COMPOSITION OF MATTER, A MEMBER OF THE CLASS CONSISTING OF FLUORESCEIN COMPOUNDS REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
18 words
AS A COMPOSITION OF MATTER, A MEMBER OF THE CLASS CONSISTING OF FLUORESCEIN COMPOUNDS REPRESENTED BY THE 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) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |