Patent US2914531A successfully refreshed from Google Patents.
US2914531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New dyestufes of the peri-dicarboxylic acid imide series
Assignee: BASF Schweiz AG
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Filing: 1958-03-11
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Granted: 1959-11-24
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Expires: 1978-03-11
Abstract
No abstract record available.
Inventors
- 👤 Staeuble Max
- 👤 Weber Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:23
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
PERIDICARBOXYLIC ACID IMIDE DYESTUFFS OF THE FORMULA
Claim 2
Dependent Claim
7 words
PERIDICARBOXYLIC ACID IMIDE DYESTUFFS OF THE FORMULA
Claim 3
Dependent Claim
8 words
THE PERIDICARBOXYLIC ACID IMIDE DYESTUFF OF THE FORMULA
Claim 4
Dependent Claim
8 words
THE PERIDICARBOXYLIC ACID IMIDE DYESTUFF OF THE FORMULA
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |