US2536957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making metalliferous azo dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1947-10-08
•
Granted: 1951-01-02
•
Expires: 1967-10-08
Abstract
No abstract record available.
Inventors
- 👤 Riat Henri
- 👤 Mayer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:53
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
PROCESS FOR THE MANUFACTURE OF A CRPRIFEROUS DYESTUFF WHICH COMPRISES TREATING THE DISAZO-DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
16 words
PROCESS FOR THE MANUFACTURE OF A CRPRIFEROUS DYESTUFF WHICH COMPRISES TREATING THE DISAZO-DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
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US1693448A
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US1940066A
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US2092429A
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US2180776A
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US2203196A
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US2243020A
Cited
US2230686A
Cited
US2424066A
Cited
US2426977A
Cited
US2353411A
Cited
US2400092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |