Patent US3223694A successfully refreshed from Google Patents.
Patent US3573083A successfully refreshed from Google Patents.
US3573083A
Expired / Lapsed
US
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Surface-layered felted fiber substrate and method of producing same
Assignee: Conwed Corp
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Filing: 1969-03-28
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Granted: 1971-03-30
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Expires: 1989-03-28
Abstract
Abstract A THICK OVERLAY OF PASTE OF TROWELING CONSISTENCY IS APPLIED TO A FELTED SUBSTRATE WHICH SUBSTRATE IS EITHER A WET BOARD MAT IN PROCESS OF FORMATION OR A DRIED FELTED FIBERBOARD. VARIOUS TREATMENTS MAY BE MADE TO THE APPLIED LAYER.
Inventors
- 👤 Bernard J Gaffney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:26
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/18; D21H11/00; E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/16; D21H13/00; D21H13/36; D21H13/38; D21H13/40; D21H21/00; D21H21/14; D21H21/34; D21H21/50; D21H21/52; D21H23/00; D21H23/02; D21H23/22; D21H23/32; D21H23/34; D21H23/36; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |