Patent US3199791A successfully refreshed from Google Patents.
US3178391A
Expired / Lapsed
US
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Isocyanates and isothiocyanates and a process for producing the same
Assignee: Bayer AG
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Filing: 1959-10-29
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Granted: 1965-04-13
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Expires: 1979-10-29
Abstract
No abstract record available.
Inventors
- 👤 Holtschmidt Hans
- 👤 Bayer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:06
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/778; C07; C07F; C07F7/00; C07F7/02; C07F7/04; C07F7/06; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
10 words
A NEW CLASS OF ISOCYANATES AND ISOTHIOCYANATES HAVING 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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |