US3336862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calender roll
Assignee: West Virginia Pulp and Paper Co
•
Filing: 1964-05-26
•
Granted: 1967-08-22
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Expires: 1984-05-26
Abstract
No abstract record available.
Inventors
- 👤 Maurice M Brundige
- 👤 David N Obenshain
- 👤 John H Fredrickson
- 👤 Jr Harry F Kolme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:58
CPC Classifications
D; D21; D21G; D21G1/00; D21G1/02; D21G1/0233; D21G9/00; D21G9/009
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
IN A STACK OF CALENDER ROLLS FORMING APPARATUS FOR CALENDERING AND GLOSSING PAPER, THE COMBINATION OF AT LEAST ONE RESILIENT ROLL ALTERNATED WITH A PLURALITY OF METAL ROLLS, SAID ESILIENT ROLL COMPRISING AN INNER METALLIC LOAD SUSTAINING CORE AND AN OUTER SOLID COVER OF A NON-FIBROUS SYNTHETIC POLYMERIC COMPOSITION SELECTED FROM THE GROUP CONSISTING OF POLYCAPROLACTAM, POLYHEXAMETHYLENE ADIPAMIDE POLY-W-AMINOUDECANOIC ACID, AND A POLYARYL CARBONATE HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2763893A
Cited
US2959119A
Cited
US2908964A
Cited
US2987802A
Cited
US3043211A
Cited
US3091173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |