US3472670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of shaped structures from regenerated cellulose transparently colored with organic dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1968-01-23
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Granted: 1969-10-14
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Expires: 1988-01-23
Abstract
No abstract record available.
Inventors
- 👤 Horst Nobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:41
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/22; C08; C08K; C08K5/00; C08K5/0008; C08K5/0041; D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |