US2987802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition calender roll
Assignee: Johns Manville Corp
•
Filing: 1957-12-31
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Granted: 1961-06-13
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Expires: 1977-12-31
Abstract
No abstract record available.
Inventors
- 👤 Robert G Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:58
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0032; B29D99/0035; D; D06; D06C; D06C15/00; D06C15/08; D21; D21G; D21G1/00; D21G1/02; D21G1/0233; D21G1/024; B29L; B29L2031/00; B29L2031/32; B29L2031/324
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A COMPOSITION ROLL FOR CALENDERS, COMPRISING, IN A CONSOLIDATED, COHERENT, DURABLE STRUCTURAL BODY, PROVIDING THE CALENDERING SURFACE OF THE ROLL, A PLURALITY OF SHEETS OF ASBESTOS PAPER CONSISTING ESSENTIALLY OF LONG ASBESTOS FIBERS SIZED WITH A HEAT-RESISTANT THERMOSETTING RESIN, SAID FIBERS BEING CHARACTERIZED AS HAVING AT LEAST 70% THEREOF GREATER THAN 200 MESH, THE PERIPHERAL CALENDERING SURFACE OF SAID BODY COMPRISING THE EDGES OF SAID SHEETS.
Claim 2
Dependent Claim
66 words
A COMPOSITION ROLL FOR CALENDERS, COMPRISING, IN A CONSOLIDATED, COHERENT, DURABLE STRUCTURAL BODY, PROVIDING THE CALENDERING SURFACE OF THE ROLL, A PLURALITY OF SHEETS OF ASBESTOS PAPER CONSISTING ESSENTIALLY OF LONG ASBESTOS FIBERS SIZED WITH A HEAT-RESISTANT THERMOSETTING RESIN, SAID FIBERS BEING CHARACTERIZED AS HAVING AT LEAST 70% THEREOF GREATER THAN 200 MESH, THE PERIPHERAL CALENDERING SURFACE OF SAID BODY COMPRISING THE EDGES OF SAID SHEETS.
References Cited (Backward Citations)
US1854509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |