Patent US2920992A successfully refreshed from Google Patents.
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 09:15
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
References Cited (Backward Citations)
GB626518A
Cited
US2734001A
Cited
US2046750A
Cited
US2198269A
Cited
US2338602A
Cited
US2285490A
Cited
US2526125A
Cited
US2426719A
Cited
US2436926A
Cited
US2477000A
Cited
US2522527A
Cited
US2535690A
Cited
US2491471A
Cited
US2648635A
Cited
US2626214A
Cited
US2692183A
Cited
US2577763A
Cited
US2689199A
Cited
US2670268A
Cited
US2810646A
Cited
US2730479A
Cited
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 |