US3416945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the optical brightening of fibers containing terephthalic acid polyesters
Assignee: Novartis Corp
•
Filing: 1965-05-24
•
Granted: 1968-12-17
•
Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Zweidler Reinhard
- 👤 Keller Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:39
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/60; D06L4/614; D06L4/636; D06L4/65; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/2971; Y10T442/00; Y10T442/20; Y10T442/2582; Y10T442/2861
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2972611A
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US3123617A
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US3330834A
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US2945033A
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US3181948A
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US3127416A
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US3310564A
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US3147253A
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US3288801A
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US3288786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |