US3265550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making a packing unit of moisture absorbent cellulosic material
Assignee: Carl Munters AB
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Filing: 1964-11-03
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Granted: 1966-08-09
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Expires: 1984-11-03
Abstract
No abstract record available.
Inventors
- 👤 Lindqvist Per Lennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:52
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/02; F28F25/08; F28F25/087; B; B01; B01J; B01J19/00; B01J19/32; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/32206; B01J2219/3221; B01J2219/32213; B01J2219/32224; B01J2219/32227; B01J2219/32255; B01J2219/32258; B01J2219/324; B01J2219/32458; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24711
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
THE PROCESS OF MAKING A PACKING UNIT OF MOISTUREABSORBENT CELLULOSIC MATERIAL FOR USE IN A GAS AND LIQUID CONTACT APPARATUS IN ORDER TO INCREASE THE WET STRENGTH OF THE PACKING WHILE MAINTAINING ITS LIQUID ABSORBENT CHARACTERISTICS, WHICH COMPRISES THE STEPS OF IMPREGNATING A WEB OF SAID CELLULLOSIC MATERIAL WITH A SUBSTANTIAL QUANTITY OF AN AQUEOUS SOLUTION OF A PHENOL-FORMALDEHYDE THERMOSETTING RESIN, DRYING SAID WEB AT A TEMPERATURE BELOW THE FINAL CURING TEMPERATURE OF SAID RESIN TO AVOID ANY SUBSTANTIAL CURING OF THE RESIN, FORMING SAID WEB INTO UNCURED CORRUGATED SHEETS, APPLYING ADHESIVE TO THE APICES OF SAID CORRUGATIONS OF EACH SHEET, SUPERPOSING EACH THUS TREATED CORRUGATED SHEET ON A SIMILIARYL INPREGNATED CELLULOSIC AND FORMING A SHEET, STACKED STRUCTURE HAVING A MASS OF ADJACENT PERIPHERALLY ENCLOSED TUBULAR CELLS OPEN AT BOTH ENDS TO ALLOW GAS AND LIQUID TO FLOW THROUGH THE CELLS, AND SUBJECTING SAID STACKED STRUCTURE TO FINAL CURING TEMPERATURES TO CURE SAID RESIN, SET SAID CORRUGATIONS, AND HARDEN SAID ADHESIVE TO THEREBY UNITE SAID SHEETS AND FORM SAID STACKED STRUCTURE INTO A PACKING UNIT.
Claim 2
Dependent Claim
175 words
THE PROCESS OF MAKING A PACKING UNIT OF MOISTUREABSORBENT CELLULOSIC MATERIAL FOR USE IN A GAS AND LIQUID CONTACT APPARATUS IN ORDER TO INCREASE THE WET STRENGTH OF THE PACKING WHILE MAINTAINING ITS LIQUID ABSORBENT CHARACTERISTICS, WHICH COMPRISES THE STEPS OF IMPREGNATING A WEB OF SAID CELLULLOSIC MATERIAL WITH A SUBSTANTIAL QUANTITY OF AN AQUEOUS SOLUTION OF A PHENOL-FORMALDEHYDE THERMOSETTING RESIN, DRYING SAID WEB AT A TEMPERATURE BELOW THE FINAL CURING TEMPERATURE OF SAID RESIN TO AVOID ANY SUBSTANTIAL CURING OF THE RESIN, FORMING SAID WEB INTO UNCURED CORRUGATED SHEETS, APPLYING ADHESIVE TO THE APICES OF SAID CORRUGATIONS OF EACH SHEET, SUPERPOSING EACH THUS TREATED CORRUGATED SHEET ON A SIMILIARYL INPREGNATED CELLULOSIC AND FORMING A SHEET, STACKED STRUCTURE HAVING A MASS OF ADJACENT PERIPHERALLY ENCLOSED TUBULAR CELLS OPEN AT BOTH ENDS TO ALLOW GAS AND LIQUID TO FLOW THROUGH THE CELLS, AND SUBJECTING SAID STACKED STRUCTURE TO FINAL CURING TEMPERATURES TO CURE SAID RESIN, SET SAID CORRUGATIONS, AND HARDEN SAID ADHESIVE TO THEREBY UNITE SAID SHEETS AND FORM SAID STACKED STRUCTURE INTO A PACKING UNIT.
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |