US2900291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of non-woven fabrics
Assignee: Individual
•
Filing: 1957-03-18
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Granted: 1959-08-18
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Expires: 1977-03-18
Abstract
No abstract record available.
Inventors
- 👤 Richard A O'connell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:54
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/587; Y; Y10; Y10S; Y10S8/00; Y10S8/08; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/31504; Y10T428/31511; Y10T442/00; Y10T442/20; Y10T442/2738
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A PROCESS FOR PRODUCING A FIBER-LIKE, POROUS, AIRPERMABLE FLEXIBLE SHEET MATERIAL WHICH COMPRISES COATING A FIRST BATCH OF FIBERS WITH A FIRST BONDING COMPOSITION, COATING A SECOND BATCH OF FIBERS WITH A SECOND BONDING COMPOSITION OF DIFFERENT CHEMICAL CONSTITUTION FROM SAID FIRST BONDING COMPOSITION, BLENDING SAID FIRST AND SECOND BATCHES OF FIBERS TO FORM A UNIFROM MFASS OF FIBERS, COMPACTING SAID MASS INTO A THIN WEB OF TINTERMINGLED FIBERS, SUBJECTING THE WEB TO HEAT TO CAUSE SPOT BONDING AT POINTS WHERE FIBERS OF THE FIRST BATCH CONTACT FIBERS OF THE SECOND BATCH, AND WASHING THE WEB TO REMOVE THE BONDING COMPOSITIONS FROM NON-CONTACTING PORTIONS OF THE FIBERS, THE SAID BONDING COMPOSITIONS HAVING THE ABILITY OF RETAINING THEIR ORIGINAL STATE WITH ESSENTIALLY NO POLYMERIZATION WHEN SUBJECTED TO HEAT IN THE ABSCENCE OF ONE ANOTHER BUT HAVING THE ABILITY TO REACT TO FORM A RESINOUS COPOLYMER WHEN SUBJECTED TO HEAT IN PRESENCE OF ONE ANOTHER.
Claim 2
Dependent Claim
153 words
A PROCESS FOR PRODUCING A FIBER-LIKE, POROUS, AIRPERMABLE FLEXIBLE SHEET MATERIAL WHICH COMPRISES COATING A FIRST BATCH OF FIBERS WITH A FIRST BONDING COMPOSITION, COATING A SECOND BATCH OF FIBERS WITH A SECOND BONDING COMPOSITION OF DIFFERENT CHEMICAL CONSTITUTION FROM SAID FIRST BONDING COMPOSITION, BLENDING SAID FIRST AND SECOND BATCHES OF FIBERS TO FORM A UNIFROM MFASS OF FIBERS, COMPACTING SAID MASS INTO A THIN WEB OF TINTERMINGLED FIBERS, SUBJECTING THE WEB TO HEAT TO CAUSE SPOT BONDING AT POINTS WHERE FIBERS OF THE FIRST BATCH CONTACT FIBERS OF THE SECOND BATCH, AND WASHING THE WEB TO REMOVE THE BONDING COMPOSITIONS FROM NON-CONTACTING PORTIONS OF THE FIBERS, THE SAID BONDING COMPOSITIONS HAVING THE ABILITY OF RETAINING THEIR ORIGINAL STATE WITH ESSENTIALLY NO POLYMERIZATION WHEN SUBJECTED TO HEAT IN THE ABSCENCE OF ONE ANOTHER BUT HAVING THE ABILITY TO REACT TO FORM A RESINOUS COPOLYMER WHEN SUBJECTED TO HEAT IN PRESENCE OF ONE ANOTHER.
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |