US2615784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene terephthalate monofils drawn and heat set for use as bristles
Assignee: EIDP Inc
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Filing: 1949-12-20
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Granted: 1952-10-28
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Expires: 1969-12-20
Abstract
No abstract record available.
Inventors
- 👤 Mcclellan William Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:19
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/229; D01; D01F; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10S; Y10S260/00; Y10S260/23; Y10S8/00; Y10S8/04; Y10S8/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
PROCESS OF IMPROVING A MONOFIL SPUN FROM POLYETHYLENE TEREPHTHALATE, FOR USE AS BRISTLE MATERIAL, WHICH PROCESS COMPRISES DRAWING SAID MONOFIL AT 55* C. TO 180* C. TO A TOTAL DRAW OF 4.6:1 TO 5.2:1 BASED UPON THE LENGTH OF SAID MONOFIL BEFORE DRAWING, HEATING SAID DRAWN MONOFIL IN A RELAXED CONDITION UNTIL IT SHRINKS 5% TO 10% OF ITS ORIGINAL DRAWN LENGTH, AND THEREAFTER HEATING SAID MONOFIL TO 150* C. TO 250* C. WHILE HELD UNDER TENSION TO PREVENT SHRINKAGE.
Claim 2
Dependent Claim
80 words
PROCESS OF IMPROVING A MONOFIL SPUN FROM POLYETHYLENE TEREPHTHALATE, FOR USE AS BRISTLE MATERIAL, WHICH PROCESS COMPRISES DRAWING SAID MONOFIL AT 55* C. TO 180* C. TO A TOTAL DRAW OF 4.6:1 TO 5.2:1 BASED UPON THE LENGTH OF SAID MONOFIL BEFORE DRAWING, HEATING SAID DRAWN MONOFIL IN A RELAXED CONDITION UNTIL IT SHRINKS 5% TO 10% OF ITS ORIGINAL DRAWN LENGTH, AND THEREAFTER HEATING SAID MONOFIL TO 150* C. TO 250* C. WHILE HELD UNDER TENSION TO PREVENT SHRINKAGE.
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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |