US3256258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibers
Assignee: EIDP Inc
•
Filing: 1961-05-05
•
Granted: 1966-06-14
•
Expires: 1981-05-05
Abstract
No abstract record available.
Inventors
- 👤 Herrman Arthur John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:09
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/04; D01F6/06; D01D; D01D5/00; D01D5/08; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4282; D04H1/4291; Y; Y10; Y10S; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
AN ELASTOMERIC FIBER OF HIGHLY CRYSTALLINE POLYPROPYLENE CHARACTERIZED BY MELT INDEX OF FROM 0.1 TO 200, SAID FIBER HAVING AN ELONGATION AT BREAK OF FROM 100% TO 700%, GAMMA ORIENTATION, A HEAT STABLE ORIENTATION ANGLE OF 10* TO 30*, AND A TENSILE RECOVERY ON THE SECOND AND SUCCEEDING STRETCH CYCLES FROM A 25% ELONGATION OF AT LEAST 82%, SAID TENSILE RECOVERY HAVING BEEN ACHIEVED BY A SEPARATE HEAT TREATMENT OF THE FIBER, AFTER IT HAS BEEN SPUN, AT AN ELEVATED TEMPERATURE OF FROM 105*C. TO 160*C.
Claim 2
Dependent Claim
86 words
AN ELASTOMERIC FIBER OF HIGHLY CRYSTALLINE POLYPROPYLENE CHARACTERIZED BY MELT INDEX OF FROM 0.1 TO 200, SAID FIBER HAVING AN ELONGATION AT BREAK OF FROM 100% TO 700%, GAMMA ORIENTATION, A HEAT STABLE ORIENTATION ANGLE OF 10* TO 30*, AND A TENSILE RECOVERY ON THE SECOND AND SUCCEEDING STRETCH CYCLES FROM A 25% ELONGATION OF AT LEAST 82%, SAID TENSILE RECOVERY HAVING BEEN ACHIEVED BY A SEPARATE HEAT TREATMENT OF THE FIBER, AFTER IT HAS BEEN SPUN, AT AN ELEVATED TEMPERATURE OF FROM 105*C. TO 160*C.
References Cited (Backward Citations)
US3019507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |