US3224987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent products from poly-epsilon-caprolactam and process of making same
Assignee: Akzona Inc
•
Filing: 1961-04-26
•
Granted: 1965-12-21
•
Expires: 1981-04-26
Abstract
No abstract record available.
Inventors
- 👤 Jacob C F Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:32
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR PREPARING TRANSPARENT ARTICLES FROM POLY-E-CAPROLACTAM WHICH COMPRISES TREATING KPOLY-E-CAPROLACTAM GRANULES WITH THE FOLLOWING MATERIALS: (1) COMPOUNDS OF THE CLASS CONSISTING OF HYDROGEN HALIDES AND ALKALI SALTS THEREOF, (2) ALIPHATIC AMINES OF THE CLASS CONSISTING OF OCTADECYLAMINE, TETRADECYLAMINE, TETRACOSYLAMINE, DIOCTADECYLAMINE, AND METHYLDIOCTADECYLAMINE, AND (3) ZINC STEARATE, SAID TREATMENTS BEING IN ANY ORDER OF SUCCESSION AND COMBINATION.
Claim 2
Dependent Claim
58 words
A PROCESS FOR PREPARING TRANSPARENT ARTICLES FROM POLY-E-CAPROLACTAM WHICH COMPRISES TREATING KPOLY-E-CAPROLACTAM GRANULES WITH THE FOLLOWING MATERIALS: (1) COMPOUNDS OF THE CLASS CONSISTING OF HYDROGEN HALIDES AND ALKALI SALTS THEREOF, (2) ALIPHATIC AMINES OF THE CLASS CONSISTING OF OCTADECYLAMINE, TETRADECYLAMINE, TETRACOSYLAMINE, DIOCTADECYLAMINE, AND METHYLDIOCTADECYLAMINE, AND (3) ZINC STEARATE, SAID TREATMENTS BEING IN ANY ORDER OF SUCCESSION AND COMBINATION.
References Cited (Backward Citations)
US2405008A
Cited
US2705227A
Cited
US2889211A
Cited
US2855267A
Cited
US2829121A
Cited
US2856373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |