US2955901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing polyethylene terephthalates
Assignee: Bayer AG
•
Filing: 1957-07-23
•
Granted: 1960-10-11
•
Expires: 1977-07-23
Abstract
No abstract record available.
Inventors
- 👤 Kruckenberg Winfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:51
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; C09B29/0025; D; D06; D06P; D06P3/00; D06P3/34; D06P3/52; D06P3/54; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
PROCESS FOR DYEING POLYETHYLENE TEREPHTHALATES WHICH COMPRISES TREATING SAID MATERIAL WITH DYESTUFFS CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
16 words
PROCESS FOR DYEING POLYETHYLENE TEREPHTHALATES WHICH COMPRISES TREATING SAID MATERIAL WITH DYESTUFFS CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
US2168337A
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US2220129A
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US2346508A
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US2638403A
Cited
US2757173A
Cited
US2714104A
Cited
US2794834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |