Patent US2898178A successfully refreshed from Google Patents.
US2898178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dyeing polyester materials
Assignee: Bayer AG
•
Filing: 1956-09-11
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Granted: 1959-08-04
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Expires: 1976-09-11
Abstract
No abstract record available.
Inventors
- 👤 Kruckenberg Winfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:37
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
PROCESS FOR DRYING POLYETHYLENE TEREPHTHALATE MATERIALS WHICH COMPRISES CONTACTING AT AN ELEVATED TEMPERATURE SAID POLYESTER WITH A MONOAZO DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
22 words
PROCESS FOR DRYING POLYETHYLENE TEREPHTHALATE MATERIALS WHICH COMPRISES CONTACTING AT AN ELEVATED TEMPERATURE SAID POLYESTER WITH A MONOAZO DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2687940A
Cited
US2228303A
Cited
US2220598A
Cited
US2220129A
Cited
US2283326A
Cited
US2330828A
Cited
US2512251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |