US3130076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous vinyl grafting of cellulose
Assignee: Wyeth Holdings LLC
•
Filing: 1961-09-29
•
Granted: 1964-04-21
•
Expires: 1981-09-29
Abstract
No abstract record available.
Inventors
- 👤 Arnold H Gruber
- 👤 Charles E Light
- 👤 Sewell T Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:49
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/02; D06M14/04; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
AN APPARATUS FOR THE CONTINUOUS, UNIFORM GRAFTING OF A VINYL MONOMER ONTO THE EXPOSED FACES OF A CONTINUOUS CELLULOSIC MATERIAL WHICH COMPRISES (A) A CLOSED TREATMENT TANK, (B) A LIQUID CIRCULATION LOOP FUNCTIONALLY COOPERATING WITH SAID TANK TO CIRCULATE A LIQUID IN SAID TANK, CONTROL ITS TEMPERATURE, CONTROL THE CONCENTRATION OF INTITATOR AND MONOMER THEREIN, AND PROVIDE LIQUID TURBULENCE, SAID LOOP COMPRISING (1) A LIQUID WITHDRAWAL LINE LEADING FROM SAID TANK BELOW THE LEVEL OF A LIQUID THEREIN, TO WITHDRAW LIQUID FROM THE TANK, (2) A VARIABLE SPEED PUMP, (3) HEATING MEANS FOR CONTROLLING THE TEMPERATURE OF LIQUID CIRCULATED THROUGH SAID LINE, AND THEREBY THE TEMPERATURE OF LIQUID IN SAID TANK, (4) MEANS TO INTRODUCE THE WITHDRAWN, TEMPERATURE CONTROLLED LIQUID BACK INTO SAID TANK CLOSELY ADJACENT TO, AND HAVING A VELOCITY WITH RESPECT TO, A MOVING WEB OF CELLULOSIC MATERIAL IN SAID TANK, THEREBY CAUSING TURBULENCE OF LIQUID IN SAID TANK, (C) VARIABLE SPEED PUMPING MEANS TO INTRODUCE AN INITIATOR-CONTAINING LIQUID INTO SAID LOOP AT SUCH A RATE AS TO MAINTAIN A DESIRED INITIATOR CONCENTRATION IN SAID TANK,
Claim 2
Independent Claim
178 words
AN APPARATUS FOR THE CONTINUOUS, UNIFORM GRAFTING OF A VINYL MONOMER ONTO THE EXPOSED FACES OF A CONTINUOUS CELLULOSIC MATERIAL WHICH COMPRISES (A) A CLOSED TREATMENT TANK, (B) A LIQUID CIRCULATION LOOP FUNCTIONALLY COOPERATING WITH SAID TANK TO CIRCULATE A LIQUID IN SAID TANK, CONTROL ITS TEMPERATURE, CONTROL THE CONCENTRATION OF INTITATOR AND MONOMER THEREIN, AND PROVIDE LIQUID TURBULENCE, SAID LOOP COMPRISING (1) A LIQUID WITHDRAWAL LINE LEADING FROM SAID TANK BELOW THE LEVEL OF A LIQUID THEREIN, TO WITHDRAW LIQUID FROM THE TANK, (2) A VARIABLE SPEED PUMP, (3) HEATING MEANS FOR CONTROLLING THE TEMPERATURE OF LIQUID CIRCULATED THROUGH SAID LINE, AND THEREBY THE TEMPERATURE OF LIQUID IN SAID TANK, (4) MEANS TO INTRODUCE THE WITHDRAWN, TEMPERATURE CONTROLLED LIQUID BACK INTO SAID TANK CLOSELY ADJACENT TO, AND HAVING A VELOCITY WITH RESPECT TO, A MOVING WEB OF CELLULOSIC MATERIAL IN SAID TANK, THEREBY CAUSING TURBULENCE OF LIQUID IN SAID TANK, (C) VARIABLE SPEED PUMPING MEANS TO INTRODUCE AN INITIATOR-CONTAINING LIQUID INTO SAID LOOP AT SUCH A RATE AS TO MAINTAIN A DESIRED INITIATOR CONCENTRATION IN SAID TANK,
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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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |