Patent US2899353A successfully refreshed from Google Patents.
US2899353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible paper web and process of
Assignee: —
•
Filing: —
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Granted: 1959-08-11
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Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:56
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/35; D21H17/46; D21H17/47; D21H17/48; D21H17/49; D21H17/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS OF PRODUCING FELTED, FIBROUS WEBS, COMPRISING THE STEPS OF MIXING WITH A WATER DISPERSION COMPRISING FROM ABOUT 0.05 TO ABOUT 3 PERCENT BY WEIGHT OF FIBER, AN ANIOMIC COLLIDAL DISPERSION OF A HYDROPHOBIC RUBBERY POLYMER AND AN ALKALINE HYDROPHILIC CONDENSATION PRODUCT OF A PHENOL WITH FORMADEHYDE IN AN AQUEOUS MEDIUM, SAID PHENOL CONDENSATION PRODUCT BEING DISPERSIBLE IN WATER WITHOUT THE AID OF DISPERSING AGENTS OTHER THAN THOSE FORMED IN SAID CONDENSATION; PRECIPITATING SAID HYDROPHOBIC AND HYDROPHILIC POLYMERS ONTO SAID FIBERS UNDER NON-ACID CONDITIONS BY ADDITION OF THE ORGANIC WATER-SOLUBLE POLYMER FORMED BY REACTING A GUANIDINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF GUANIDINE AND THE WATER SOLUBLE SALTS OF GUANIDINE WITH FORMALDEHYDE UNDER BASIC CONDITIONS; AND SUBSEQUENTLY FORMING A WEB AT A PH WITHIN THE RANGE IN WHICH THE ANOMIC COLLOIDAL DISPERSION IS NORMALLY STABLE.
Claim 2
Dependent Claim
137 words
A PROCESS OF PRODUCING FELTED, FIBROUS WEBS, COMPRISING THE STEPS OF MIXING WITH A WATER DISPERSION COMPRISING FROM ABOUT 0.05 TO ABOUT 3 PERCENT BY WEIGHT OF FIBER, AN ANIOMIC COLLIDAL DISPERSION OF A HYDROPHOBIC RUBBERY POLYMER AND AN ALKALINE HYDROPHILIC CONDENSATION PRODUCT OF A PHENOL WITH FORMADEHYDE IN AN AQUEOUS MEDIUM, SAID PHENOL CONDENSATION PRODUCT BEING DISPERSIBLE IN WATER WITHOUT THE AID OF DISPERSING AGENTS OTHER THAN THOSE FORMED IN SAID CONDENSATION; PRECIPITATING SAID HYDROPHOBIC AND HYDROPHILIC POLYMERS ONTO SAID FIBERS UNDER NON-ACID CONDITIONS BY ADDITION OF THE ORGANIC WATER-SOLUBLE POLYMER FORMED BY REACTING A GUANIDINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF GUANIDINE AND THE WATER SOLUBLE SALTS OF GUANIDINE WITH FORMALDEHYDE UNDER BASIC CONDITIONS; AND SUBSEQUENTLY FORMING A WEB AT A PH WITHIN THE RANGE IN WHICH THE ANOMIC COLLOIDAL DISPERSION IS NORMALLY STABLE.
References Cited (Backward Citations)
US2373613A
Cited
US2601597A
Cited
US2457493A
Cited
US2550143A
Cited
US2601598A
Cited
US2643186A
Cited
US2686121A
Cited
US2745744A
Cited
US2668111A
Cited
US2785975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |