Patent US2701815A successfully refreshed from Google Patents.
US2701815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized phenyl-hydrazine
Assignee: Hoechst AG
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Filing: 1953-10-27
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Granted: 1955-02-08
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Expires: 1973-10-27
Abstract
No abstract record available.
Inventors
- 👤 Boker Reinhard
- 👤 Fuchs Hans Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:58
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/82; C07C209/90; C07C241/00; C07C243/00; C07C243/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
A STABLE PHENYL-HYDRAZINE, WHEREIN HEXAMETHYLENE TETRAMINE IS PRESENT IN A PROPORTION OF 1 TO 3 PER CENT.
Claim 2
Dependent Claim
17 words
A STABLE PHENYL-HYDRAZINE, WHEREIN HEXAMETHYLENE TETRAMINE IS PRESENT IN A PROPORTION OF 1 TO 3 PER CENT.
Claim 3
Dependent Claim
25 words
A PROCESS FOR THE MANUFACTURE OF A STABLE PHENYLHYDRAZINE, COMPRISING ADDITION OF HEXAMETHYLENE TETRAMINE IN A PROPORTION OF 1 TO 3 PER CENT. TO PHENYL-HYDRAZINE.
Claim 4
Dependent Claim
25 words
A PROCESS FOR THE MANUFACTURE OF A STABLE PHENYLHYDRAZINE, COMPRISING ADDITION OF HEXAMETHYLENE TETRAMINE IN A PROPORTION OF 1 TO 3 PER CENT. TO PHENYL-HYDRAZINE.
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) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |