Patent US2268748A successfully refreshed from Google Patents.
Patent US3148839A successfully refreshed from Google Patents.
US3148839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing paper stock
Assignee: John W Bolton and Sons Inc
•
Filing: 1960-08-29
•
Granted: 1964-09-15
•
Expires: 1980-08-29
Abstract
No abstract record available.
Inventors
- 👤 Donald W Danforth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:00
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PROCESS FOR TREATING MATERIALS IN A ROTARY REFINER HAVING AN INLET, AN OUTLET AND WORKING SURFACES ON A ROTOR AND STATOR ESTABLISHING A PATH THERETHROUGH WHICH COMPRISES THE STEPS OF INTRODUCING A UNIFORM STREAM OF SAID MATERIAL, IN DRY STATE, INTO A LIQUID VEHICLE JUST IN ADVANCE OF SAID WORKING SURFACES AND PROXIMATE THE INLET OF SAID REFINER TO FORM A LOW CONSISTENCY MIXTURE; SUBSTANTIALLY SIMULTANEOUSLY FLUSHING SAID MIXTURE INTO SAID REFINER; THEN IMMEDIATELY ADVANCING SAID MIXTURE AT HIGH VELOCITY THROUGH SAID REFINER ALONG SAID PATH AND POSITIVELY DEFLECTING SAID MIXTURE SINUOSLY BACK AND FORTH BETWEEN THE ROTOR AND STATOR OF SAID REFINER AND REPEATEDLY ACROSS SAID WORKING SURFACES FOR TREATING SAID MATERIAL ALONG SAID PATH FROM A LATERAL DIRECTION ONLY AND THEN DISCHARGING SAID MIXTURE FROM SAID REFINER INTO AN ATMOSPHERIC ENVIRONMENT.
Claim 2
Dependent Claim
134 words
A PROCESS FOR TREATING MATERIALS IN A ROTARY REFINER HAVING AN INLET, AN OUTLET AND WORKING SURFACES ON A ROTOR AND STATOR ESTABLISHING A PATH THERETHROUGH WHICH COMPRISES THE STEPS OF INTRODUCING A UNIFORM STREAM OF SAID MATERIAL, IN DRY STATE, INTO A LIQUID VEHICLE JUST IN ADVANCE OF SAID WORKING SURFACES AND PROXIMATE THE INLET OF SAID REFINER TO FORM A LOW CONSISTENCY MIXTURE; SUBSTANTIALLY SIMULTANEOUSLY FLUSHING SAID MIXTURE INTO SAID REFINER; THEN IMMEDIATELY ADVANCING SAID MIXTURE AT HIGH VELOCITY THROUGH SAID REFINER ALONG SAID PATH AND POSITIVELY DEFLECTING SAID MIXTURE SINUOSLY BACK AND FORTH BETWEEN THE ROTOR AND STATOR OF SAID REFINER AND REPEATEDLY ACROSS SAID WORKING SURFACES FOR TREATING SAID MATERIAL ALONG SAID PATH FROM A LATERAL DIRECTION ONLY AND THEN DISCHARGING SAID MIXTURE FROM SAID REFINER INTO AN ATMOSPHERIC ENVIRONMENT.
References Cited (Backward Citations)
US1795603A
Cited
US2921749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |