US2763684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrazides of dihydroxybenzoic acids
Assignee: Dow Chemical Co
•
Filing: 1953-07-09
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Granted: 1956-09-18
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Expires: 1973-07-09
Abstract
No abstract record available.
Inventors
- 👤 Floyd L Beman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:43
CPC Classifications
C; C07; C07C; C07C243/00; C07C243/24; C07C243/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) THE HYDRAZIDES OF 2,3-DIHYDROXYBENZOIC ACID, 2,5DIHYDROXYBENZOIC ACID, 3-METHYL-2,5-DIHYDROXYBENZOIC ACID, 4-METHYL-2,5-DIHYDROXYBENZOIC ACID, 5-METHYL-2,3DIHYDROXYBENZOIC ACID AND 6-METHYL-2,5-DIHYDROXYBENZOIC ACID, AND (B) THE ACID ADDITION SALTS OF SAID HYDRAZIDES.
Claim 2
Dependent Claim
34 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) THE HYDRAZIDES OF 2,3-DIHYDROXYBENZOIC ACID, 2,5DIHYDROXYBENZOIC ACID, 3-METHYL-2,5-DIHYDROXYBENZOIC ACID, 4-METHYL-2,5-DIHYDROXYBENZOIC ACID, 5-METHYL-2,3DIHYDROXYBENZOIC ACID AND 6-METHYL-2,5-DIHYDROXYBENZOIC ACID, AND (B) THE ACID ADDITION SALTS OF SAID 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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |