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US2420729A
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Dyeing with indigoid vat dyestuffs
Assignee: Honeywell International Inc
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Filing: 1944-03-30
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Granted: 1947-05-20
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Expires: 1964-03-30
Abstract
No abstract record available.
Inventors
- 👤 Weber Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:20
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/228
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE84974C
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US129753A
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US443026A
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US794050A
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US1199273A
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US1148966A
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GB213266A
Cited
US1682453A
Cited
FR669189A
Cited
GB379321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |