Patent US5320897A successfully refreshed from Google Patents.
Patent US4022861A successfully refreshed from Google Patents.
US4022861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of manufacturing water-repellent fluffy batts of wood pulp fibers
Assignee: Johnson and Johnson
•
Filing: 1975-06-10
•
Granted: 1977-05-10
•
Expires: 1995-06-10
Abstract
Abstract A method of manufacturing a water-repellent, fluffy lightweight batt of wood pulp fibers comprising applying a water-repellent material to a surface of a dry wood pulp board so that the water-repellent penetrates through only a portion of the board. The treated board is ground to individualize the fibers, and the ground fibers are collected in a batt with the water-repellent treated fibers distributed uniformly throughout to produce a fluffy, water-repellent batt of wood pulp fibers.
Inventors
- 👤 Yvon George Levesque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:04
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/52; D; D21; D21H; D21H11/00; D21H11/14; D21H21/00; D21H21/14; D21H21/16; D21H5/00; D21H5/26; D21H5/2607; D21H5/2628; D21H5/2635
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
A method of manufacturing a water-repellent, fluffy, lightweight batt of wood pulp fibers comprising: providing a prepared hard, substantially dry board of compacted wood pulp fibers, applying to a surface of said board while in a non-aqueous condition between 1/4 and 2% by weight of said board of a water-repellent material, said water-repellent coating the fibers of the surface and extending through between 45 and 95% of the depth of the pulp board, grinding the treated pulp board to individualize and uniformly disperse water-repellent treated fibers and untreated fibers, and collecting the individualized fibers in the form of a lofty, fluffy batt of wood pulp fibers having water repellent material uniformly distributed throughout the batt whereby the entire batt is water repellent.
Claim 2
Independent Claim
122 words
A method of manufacturing a water-repellent, fluffy, lightweight batt of wood pulp fibers comprising: providing a prepared hard, substantially dry board of compacted wood pulp fibers, applying to a surface of said board while in a non-aqueous condition between 1/4 and 2% by weight of said board of a water-repellent material, said water-repellent coating the fibers of the surface and extending through between 45 and 95% of the depth of the pulp board, grinding the treated pulp board to individualize and uniformly disperse water-repellent treated fibers and untreated fibers, and collecting the individualized fibers in the form of a lofty, fluffy batt of wood pulp fibers having water repellent material uniformly distributed throughout the batt whereby the entire batt is water repellent.
Claim 3
Dependent Claim
19 words
A method according to claim 1 wherein the water-repellent material is sprayed on the surface of the pulp board.
Claim 4
Dependent Claim
21 words
A method according the claim 1 wherein the pulp board after having a water-repellent material thereon is dried prior to grinding
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |