Patent US3411979A successfully refreshed from Google Patents.
US3411979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed artificial filament
Assignee: Polymers Inc
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Filing: 1965-08-24
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Granted: 1968-11-19
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Expires: 1985-08-24
Abstract
No abstract record available.
Inventors
- 👤 Jr John C Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:48
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/247; A; A46; A46D; A46D1/00; D01D5/20; D01F; D01F1/00; D01F1/02; D01F1/10; D01F6/00; D01F6/02; D01F6/04; D01F6/06; D01F6/28; D01F6/30; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10S264/16; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975; Y10T428/31504; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A FOAMED SYNTHETIC BRUSH FILAMENT HAVING A HOMOGENOUS CELL STRUCTURE FORMED FROM A LONG CHAIN LINEAR STABLE THERMOPLASTIC POLYMER SELECTED FROM THE GROUP CONSISTING OF PROPYLENE POLYMERS AND CO-POLYMERS COMPRISING: A CROSS-SECTION OF AT LEAST TWO LOBULAR PROJECTIONSD EXTENDING FROM EACH OTHER AT ABOUT EQUAL ANGLES FROM A COMMON CENTER PORTION, SAID FILAMENT HAVING REPEATED UNORIENTED AND ORIENTED PORTIONS ADJACENT TO ONE ANOTHER THROUGH ITS ENTIRE LENGH, SAID UNORIENTED PORTIONS HAVING A LARGER CROSS-SECTIONAL AREA THAN THE ORIENTED PORTIONS, THE AGGREGATE LENGTHS OF THE ORIENTED PORTIONS BEING AT LEAST 40% BUT NOT MORE THAN 80% OF THE TOTAL LENGTH OF THE FILAMENT, SAID FILAMENT HAVING A SPECIFIC GRAVITY NOT EXCEEDING 0.080, WHEREBY VARYING AMOUNTS OF STIFFNESS AND RECOVERY ARE IMPARTED TO THE FILAMENT ALONG ITS LENGTH.
Claim 2
Dependent Claim
126 words
A FOAMED SYNTHETIC BRUSH FILAMENT HAVING A HOMOGENOUS CELL STRUCTURE FORMED FROM A LONG CHAIN LINEAR STABLE THERMOPLASTIC POLYMER SELECTED FROM THE GROUP CONSISTING OF PROPYLENE POLYMERS AND CO-POLYMERS COMPRISING: A CROSS-SECTION OF AT LEAST TWO LOBULAR PROJECTIONSD EXTENDING FROM EACH OTHER AT ABOUT EQUAL ANGLES FROM A COMMON CENTER PORTION, SAID FILAMENT HAVING REPEATED UNORIENTED AND ORIENTED PORTIONS ADJACENT TO ONE ANOTHER THROUGH ITS ENTIRE LENGH, SAID UNORIENTED PORTIONS HAVING A LARGER CROSS-SECTIONAL AREA THAN THE ORIENTED PORTIONS, THE AGGREGATE LENGTHS OF THE ORIENTED PORTIONS BEING AT LEAST 40% BUT NOT MORE THAN 80% OF THE TOTAL LENGTH OF THE FILAMENT, SAID FILAMENT HAVING A SPECIFIC GRAVITY NOT EXCEEDING 0.080, WHEREBY VARYING AMOUNTS OF STIFFNESS AND RECOVERY ARE IMPARTED TO THE FILAMENT ALONG ITS LENGTH.
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) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |