US2822298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous products
Assignee: Armstrong World Industries Inc
•
Filing: 1955-08-29
•
Granted: 1958-02-04
•
Expires: 1975-08-29
Abstract
No abstract record available.
Inventors
- 👤 Paul E Merrifield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:34
CPC Classifications
B; B32; B32B; B32B27/00; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1615; B01D39/1623; B01D39/163; B01D39/18; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64; B01D2239/00; B01D2239/04; B01D2239/0471; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T442/00; Y10T442/20; Y10T442/2139; Y10T442/2549; Y10T442/2566
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
THE METHOD OF FORMING A FULL FLOW FILTER FELT WHICH COMPRISES FORMING A SHEET OF FELTED FIBERS HAVING DEPOSITED THEREON LESS THAN ABOUT 71/2% BUTADIENE-ACRYLONITRILE COPOLYMER AS A BINDER, DEPOSITING ON SAID SHEET THE RESINOUS PRODUCT OF ACROLEIN AND A REDUCING SUGAR PREPARED UNDER ACIDIC CONDITIONS IN THE PRESENCE OF WATER, AND DRYING SAID SHEET.
Claim 2
Independent Claim
55 words
THE METHOD OF FORMING A FULL FLOW FILTER FELT WHICH COMPRISES FORMING A SHEET OF FELTED FIBERS HAVING DEPOSITED THEREON LESS THAN ABOUT 71/2% BUTADIENE-ACRYLONITRILE COPOLYMER AS A BINDER, DEPOSITING ON SAID SHEET THE RESINOUS PRODUCT OF ACROLEIN AND A REDUCING SUGAR PREPARED UNDER ACIDIC CONDITIONS IN THE PRESENCE OF WATER, AND DRYING SAID SHEET.
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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) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |