US2458397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of nylon fibers by treating with nitrogenous condensation products
Assignee: Akzo Nobel UK PLC
•
Filing: 1944-10-12
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Granted: 1949-01-04
•
Expires: 1964-10-12
Abstract
No abstract record available.
Inventors
- 👤 Macgregor James Hutchison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:03
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/241; D06P1/00; D06P1/44; D06P1/52; D06P1/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2234905A
Cited
US2119189A
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US2168336A
Cited
US2253457A
Cited
US2317965A
Cited
GB547844A
Cited
US2356677A
Cited
US2347143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |