US2716663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrazides of phenyl substituted dihydroxybenzoic acids
Assignee: Dow Chemical Co
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Filing: 1953-07-09
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Granted: 1955-08-30
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Expires: 1973-07-09
Abstract
No abstract record available.
Inventors
- 👤 Floyd L Heman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:06
CPC Classifications
C; C07; C07C; C07C243/00; C07C243/24; C07C243/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
38 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) THE HYDRAZIDES AND PHENYL HYDRAZIDES FO 3-PHENYL2,5-DIHYDROXYBENZOIC ACID, 4-PHENYL-2,5-DIHYDROXYBENZOIC ACID, 5-PHENYL-2,3 - DIHDYDROXYBENZOIC ACID AND 6-PHENYL-2,5-DIHYDROXYBENZOIC ACID, AND (B) THE ACID ADDITION SALTS OF SAID HYDRAZIDES AND PHENYL HYDRAZIDES.
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) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |