Patent US3253715A successfully refreshed from Google Patents.
US3253715A
Expired / Lapsed
US
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Process and composition for boil proof non-woven filter media
Assignee: Johnson and Johnson
•
Filing: 1963-02-06
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Granted: 1966-05-31
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Expires: 1983-02-06
Abstract
No abstract record available.
Inventors
- 👤 Erle V Painter
- 👤 William R Strickel
- 👤 George L Weir
- 👤 Fred K Mesek
- 👤 Felice C Palermo
- 👤 Robert C Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:45
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/18; B01D2239/00; B01D2239/04; B01D2239/0464; B01D2239/06; B01D2239/065; B01D2239/0668; B01D2239/0681; B01D2239/08; B01D2239/086; B01D2239/12; B01D2239/1225; B01D2239/1233; B01D2239/1291
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A BOIL-PROOF NON-WOVEN FILTER MEDIA ADAPTED FOR THE FILTRATION OF MILK CONSISTING ESSENTIALLY OF CELLULOSIC FIBERS DISPOSED IN A WEB TO FORM A PLURALITY OF FILTERING PORES BETWEEN THE FIBERS SAID FIBERS BEING INTERBONDED BY THE REACTION PRODUCT OF POLYVINYL ALCOHOL OF 15-75 CENTIPOISES VISCOSITY AS DETERMINED ON A 4% SOULTION AT 20*C. BASIS AND A POLYACRYLIC ACID POLYMER OF 90,000 TO 4,000,000 MOLECULAR WEIGHT SAID REACTION PRODUCT BEING INSOLUBLE IN BOILING WATER AND PRESENT IN SAID FILTER MEDIA ON A DRY SOLID BASIS IN AN AMOUNT OF AT LEAST 1.25 TO 10.6 PERCENT OF THE CELLULOSIC FIBERS, SAID FILTER MEDIA HAVING A MINIMUM TENSIBLE STRENGTH AFTER IMMERSION IN BOILING WATER FOR 20 MINUTES OF AT LEAST 0.2 LBS. PER INCH.
Claim 2
Dependent Claim
121 words
A BOIL-PROOF NON-WOVEN FILTER MEDIA ADAPTED FOR THE FILTRATION OF MILK CONSISTING ESSENTIALLY OF CELLULOSIC FIBERS DISPOSED IN A WEB TO FORM A PLURALITY OF FILTERING PORES BETWEEN THE FIBERS SAID FIBERS BEING INTERBONDED BY THE REACTION PRODUCT OF POLYVINYL ALCOHOL OF 15-75 CENTIPOISES VISCOSITY AS DETERMINED ON A 4% SOULTION AT 20*C. BASIS AND A POLYACRYLIC ACID POLYMER OF 90,000 TO 4,000,000 MOLECULAR WEIGHT SAID REACTION PRODUCT BEING INSOLUBLE IN BOILING WATER AND PRESENT IN SAID FILTER MEDIA ON A DRY SOLID BASIS IN AN AMOUNT OF AT LEAST 1.25 TO 10.6 PERCENT OF THE CELLULOSIC FIBERS, SAID FILTER MEDIA HAVING A MINIMUM TENSIBLE STRENGTH AFTER IMMERSION IN BOILING WATER FOR 20 MINUTES OF AT LEAST 0.2 LBS. PER INCH.
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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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |