US3266927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the aftertreatment of polyurethane foam
Assignee: Kimberly Clark Tissue Co
•
Filing: 1962-07-03
•
Granted: 1966-08-16
•
Expires: 1982-07-03
Abstract
No abstract record available.
Inventors
- 👤 Lorenz Fritz
- 👤 Schlagenhof Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:43
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/38; Y; Y10; Y10S; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS OF TREATING FLEXIBLE POLYURTHANE FOAM SHEETING WITH CAUSTIC ALKALI SOLUTION WHICH COMPRISES WINDING SAID FOAM SHEETING INTO A MULTI-LAYERED ROLL HAVING A GENERALLY HORIZONTAL AXIS, IMPREGNATING THE POLYURETHANE FOAM SHEETING WITH A CAUSTIC ALKALI SOLUTION, ROTATING SLOWLY THE ROLL OF IMPREGNATED FOAM SHEETING TO MAINTAIN SAID ALKALI SOLUTION WITHIN THE FOAM SHEETING FOR A TIME SUFFICIENT FOR CHEMICAL REACTION THEREWITH, AND SUBSEQUENTLY INCREASING THE SPEED OF ROTATION OF THE ROLLED FOAM SHEETING TO EXPEL RADIALLY THEREFROM THE CAUSTIC ALKALI SOLUTION.
Claim 2
Dependent Claim
82 words
A PROCESS OF TREATING FLEXIBLE POLYURTHANE FOAM SHEETING WITH CAUSTIC ALKALI SOLUTION WHICH COMPRISES WINDING SAID FOAM SHEETING INTO A MULTI-LAYERED ROLL HAVING A GENERALLY HORIZONTAL AXIS, IMPREGNATING THE POLYURETHANE FOAM SHEETING WITH A CAUSTIC ALKALI SOLUTION, ROTATING SLOWLY THE ROLL OF IMPREGNATED FOAM SHEETING TO MAINTAIN SAID ALKALI SOLUTION WITHIN THE FOAM SHEETING FOR A TIME SUFFICIENT FOR CHEMICAL REACTION THEREWITH, AND SUBSEQUENTLY INCREASING THE SPEED OF ROTATION OF THE ROLLED FOAM SHEETING TO EXPEL RADIALLY THEREFROM THE CAUSTIC ALKALI SOLUTION.
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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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |