Patent US3383749A successfully refreshed from Google Patents.
US3383749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cotton filled calender roll and method of making
Assignee: BF Perkins and Son Inc
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Filing: 1966-06-28
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Granted: 1968-05-21
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Expires: 1986-06-28
Abstract
No abstract record available.
Inventors
- 👤 Vernon L Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:09
CPC Classifications
D; D06; D06C; D06C15/00; D06C15/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/49547; Y10T29/49549; Y10T29/49554
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A CALENDER ROLL OF THE CLASS DESCRIBED COMPRISING IN COMBINATION, A RIGID CENTRAL SHAFT, DISC-LIKE MEMBERS DISPOSED IN ADJACENCY ON SAID SHAFT, SAID DISC LIKE MEMBERS BEING FORMED OF COTTON FIBERS AND THREADS PRETREATED WITH A REMOVAL THEREFROM OF ALL RESIDUAL OILS AND FATS AND WAXES TO ALLOW A PURE CELLULOSE FILLING OR ENCHANCING THE HEAT RESISTANT QUALITY.
Claim 2
Dependent Claim
58 words
A CALENDER ROLL OF THE CLASS DESCRIBED COMPRISING IN COMBINATION, A RIGID CENTRAL SHAFT, DISC-LIKE MEMBERS DISPOSED IN ADJACENCY ON SAID SHAFT, SAID DISC LIKE MEMBERS BEING FORMED OF COTTON FIBERS AND THREADS PRETREATED WITH A REMOVAL THEREFROM OF ALL RESIDUAL OILS AND FATS AND WAXES TO ALLOW A PURE CELLULOSE FILLING OR ENCHANCING THE HEAT RESISTANT QUALITY.
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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |