Patent US2904952A successfully refreshed from Google Patents.
US2904952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing crimped yarns
Assignee: Heberlein Patent Corp
•
Filing: 1952-10-22
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Granted: 1959-09-22
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Expires: 1972-10-22
Abstract
No abstract record available.
Inventors
- 👤 Weiss Ernst
- 👤 Risch Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:59
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR PRODUCING A VOLUMINOUS, PERMANENTLY AND UNIFORMLY CRIMPED SYNTHETIC ORGANIC TEXTILE YARN HAVING A HIGH TOTAL ELONGATION AND A LOW FIBER ELONGATION, WHICH CONSISTS OF THE STEPS OF TWISTING IN A SINGLE OPERATION A YARN OF A DENIER OF 20 TO 450 IN ACCORDANCE WITH THE FOLLOWING EQUATION:
Claim 2
Dependent Claim
50 words
A PROCESS FOR PRODUCING A VOLUMINOUS, PERMANENTLY AND UNIFORMLY CRIMPED SYNTHETIC ORGANIC TEXTILE YARN HAVING A HIGH TOTAL ELONGATION AND A LOW FIBER ELONGATION, WHICH CONSISTS OF THE STEPS OF TWISTING IN A SINGLE OPERATION A YARN OF A DENIER OF 20 TO 450 IN ACCORDANCE WITH THE FOLLOWING EQUATION:
References Cited (Backward Citations)
US2019185A
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US2295593A
Cited
US2465996A
Cited
US2564245A
Cited
GB660993A
Cited
US2585518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |