US2920992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article of commerce
Assignee: EIDP Inc
•
Filing: 1954-09-22
•
Granted: 1960-01-12
•
Expires: 1974-09-22
Abstract
No abstract record available.
Inventors
- 👤 James K Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:25
CPC Classifications
D; D21; D21F; D21F9/00; D21F9/02; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A PROCESS OF MAKING A HIGH STRENGTH PAPER-LIKE PELLICLE OF A MASS OF SELF-BONDED, MOLEULARLY ORIENTED FIBER PRODUCED FROM A LINEAR, SYNTHETIC POLYMER OF ACRYLONITRILLE WHICH COMPRISES CONCENTRATION BY EVAPORATION OF SOLVENT THE DILKUTE AQUEOUS SOLUTION OF AN INGORGANIC SALT FROM THE GROUP CONSISTING OF A WATER-SOLUBLE THIOCYANATES, IODIDES, BROMIDES, AND CHLORIDES OF GROUPS I AND II METALS OF ATOMIC NUMBERS 3 TO 48, THE SAID DILUTE SOLUTION BEING APPLIED TO THE SAID FIBER AT A CONCENTRATION AT WHICH THE SAID SOLUTION HAS SUBSTANTIALLY NO SOLVENT ACTION UPON THE SAID FIBER, THE SAID SOLUTION MIGRATING BY CAPILLARY ACTION TO POINTS OF INTERSECTION OF THE SAID
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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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |