Patent US4446228A successfully refreshed from Google Patents.
Patent US3056708A successfully refreshed from Google Patents.
US3056708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral fiber mat formation
Assignee: West Virginia Pulp and Paper Co
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Filing: 1959-05-13
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Granted: 1962-10-02
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Expires: 1979-05-13
Abstract
No abstract record available.
Inventors
- 👤 Frank J Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:01
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/587; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/31504; Y10T428/31855; Y10T428/31859; Y10T428/31877
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
A FELTED MINERAL FIBER MAT CONTAINING A MULTIPLICITY OF INDISCRIMINTELY DISTRIBUTED PARTICLES OF A THERMOSET RESIN BINDER WHICH BONDS SAID FIBER TOGETHER AT POINTS OF CONTACT BETWEEN SAID FIBERS AND WHICH IS THE PRODUCT OF HEAT CURING A BLEND OF AN "A" STAGE RESOLE WITH FROM 0.1 TO 9 PARTS BY WEIGHT OF ALKALI LIGNIN PER PART OF SAID RESOLE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |