US2835622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite molded board and method of manufacture
Assignee: Changewood Corp
•
Filing: 1954-12-08
•
Granted: 1958-05-20
•
Expires: 1974-12-08
Abstract
No abstract record available.
Inventors
- 👤 James D A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:17
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/16; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1052; Y10T156/1082; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24521; Y10T428/24537; Y10T428/24595
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE PROCESS OF MOLDING FIBROUS MATERIALS TO PRODUCE COMPOSITE BOARDS WHICH REMAIN FLAT IN VARYING AMBIENT ATMOSPHERE COMPRISING THE STEPS OF INTERFELTING DRY FIBROUS MATERIALS IN COMBINATION WITH A THERMOSETTING RESINOUS BINDER IN AN INTERMEDIATE STAGE OF POLYMERIC GROWTH TO FORM A MAT, REMOVING FIBROUS MATERIAL FROM THE SURFACE PORTION OF THE MAT IN SPACED PARALLEL, LINEAL ZONES, SUPERIMPOSING A THIN SHEET OF UNIFORM THICKNESS ON THE MAT SURFACE HAVING THE DEPLETED LINEAL ZONES, AND COMPRESSING THE SURFACED MAT BETWEEN HEATED, FLAT MOLD SURFACES UNTIL
Claim 2
Dependent Claim
85 words
THE PROCESS OF MOLDING FIBROUS MATERIALS TO PRODUCE COMPOSITE BOARDS WHICH REMAIN FLAT IN VARYING AMBIENT ATMOSPHERE COMPRISING THE STEPS OF INTERFELTING DRY FIBROUS MATERIALS IN COMBINATION WITH A THERMOSETTING RESINOUS BINDER IN AN INTERMEDIATE STAGE OF POLYMERIC GROWTH TO FORM A MAT, REMOVING FIBROUS MATERIAL FROM THE SURFACE PORTION OF THE MAT IN SPACED PARALLEL, LINEAL ZONES, SUPERIMPOSING A THIN SHEET OF UNIFORM THICKNESS ON THE MAT SURFACE HAVING THE DEPLETED LINEAL ZONES, AND COMPRESSING THE SURFACED MAT BETWEEN HEATED, FLAT MOLD SURFACES UNTIL
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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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |