US3124631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for providing high density dry spun
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:02
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/228; D01; D01F; D01F6/00; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A PROCESS FOR PROVIDING HIGH DENSITY, DRY-SPUN ACRYLONITRILE POLYMER FILAMENTS WHEREIN SAID FILAMENTS ARE CONCURRENTLY WASHED AND DRAWN AT LEAST TWO TIMES THEIR ORIGINAL LENGTH BY SUCCESSIVELY PASSING A BUNDLE OF UNDRAWN, SOLVENT-LADEN FILAMENTS INTO A PLURALITY OF RESERVOIRS OF A CASCADING WATER BATH, THE STEPS COMPRISING HEATING THE LOWER RESERVOIRS OF SAID BATH TO A TEMPERATURE FROM ABOUT 90* TO 100*C., SUCCESSIVELY PASSING SAID FILAMENTS INTO THE FIRST AND EACH SUCCEEDING LOWER RESERVOIR AND WITHDRAWING THEM AT A RATE TO IMPART FROM ABOUT 40% TO ABOUT 70% OF THE TOTAL DRAW, HEATING SAID UPPER RESERVOIRS TO A TEMPERATURE FROM ABOUT 50* TO 88*C.,
Claim 2
Dependent Claim
105 words
IN A PROCESS FOR PROVIDING HIGH DENSITY, DRY-SPUN ACRYLONITRILE POLYMER FILAMENTS WHEREIN SAID FILAMENTS ARE CONCURRENTLY WASHED AND DRAWN AT LEAST TWO TIMES THEIR ORIGINAL LENGTH BY SUCCESSIVELY PASSING A BUNDLE OF UNDRAWN, SOLVENT-LADEN FILAMENTS INTO A PLURALITY OF RESERVOIRS OF A CASCADING WATER BATH, THE STEPS COMPRISING HEATING THE LOWER RESERVOIRS OF SAID BATH TO A TEMPERATURE FROM ABOUT 90* TO 100*C., SUCCESSIVELY PASSING SAID FILAMENTS INTO THE FIRST AND EACH SUCCEEDING LOWER RESERVOIR AND WITHDRAWING THEM AT A RATE TO IMPART FROM ABOUT 40% TO ABOUT 70% OF THE TOTAL DRAW, HEATING SAID UPPER RESERVOIRS TO A TEMPERATURE FROM ABOUT 50* TO 88*C.,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |