US2567955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of guanidine thiocyanate
Assignee: Wyeth Holdings LLC
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Filing: 1950-12-14
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Granted: 1951-09-18
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Expires: 1970-12-14
Abstract
No abstract record available.
Inventors
- 👤 Nat H Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:59
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/54; C07D251/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
THE METHOD OF PREPARING GUANIDINE THIOCYANATE COMPRISING REACTING CARBON DISULFIDE AND AMMONIA IN CLOSED REACTION ZONE, AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE 185*-450* C.
Claim 2
Independent Claim
25 words
THE METHOD OF PREPARING GUANIDINE THIOCYANATE COMPRISING REACTING CARBON DISULFIDE AND AMMONIA IN CLOSED REACTION ZONE, AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE 185*-450* C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |