Patent US3147235A successfully refreshed from Google Patents.
US3147235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical brightening of various forms of polyamide resin
Assignee: Novartis AG
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Filing: 1959-06-02
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Granted: 1964-09-01
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Expires: 1979-06-02
Abstract
No abstract record available.
Inventors
- 👤 Zweidler Reinhard
- 👤 Gysling Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:20
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/16; C07D249/18; C07D249/20; C07D249/22; C07D249/24; C07D403/00; C07D403/02; C07D403/12; C08; C08J; C08J3/00; C08J3/20; C08K; C08K5/00; C08K5/0008; C08K5/0041; C08J2377/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
THE METHOD OF OPITCALLY BRIGHTENING SYNTHETIC POLYMER WHICH COMPRISES INCORPORATING INTO THE LIQUID MELT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF MONOMERIC CAPROLACTAM AND HEXANE DIAMINE ADIPATE, FROM ABOUT 0.01 TO ABOUT 0.1% BY WEIGHT OF COMPOUND OF THE FORMULA
Claim 2
Independent Claim
42 words
THE METHOD OF OPITCALLY BRIGHTENING SYNTHETIC POLYMER WHICH COMPRISES INCORPORATING INTO THE LIQUID MELT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF MONOMERIC CAPROLACTAM AND HEXANE DIAMINE ADIPATE, FROM ABOUT 0.01 TO ABOUT 0.1% BY WEIGHT OF COMPOUND OF THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |