Patent US4533581A successfully refreshed from Google Patents.
US4533581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly heat-resistant disc roll
Assignee: Nichias Corp
•
Filing: 1983-03-07
•
Granted: 1985-08-06
•
Expires: 2003-03-07
Abstract
Abstract Disclosed is a highly heat-resistant disc roll comprising laminated discs, each disc comprising 20 to 90% by weight, based on the total solids of mica particles, 1 to 35% by weight, based on the total solids, of a binder, 5 to 40% weight, based on the total solids, of an inorganic filler and 1 to 30% by weight, based on the total solids, of a reinforcing fiber.
Inventors
- 👤 Hiroshi Asaumi
- 👤 Shigeo Take
- 👤 Masazumi Akase
- 👤 Isao Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:24
CPC Classifications
C; C03; C03B; C03B15/00; C03B15/18; B; B65; B65G; B65G39/00; B65G39/02; B65G39/07; C03B35/00; C03B35/14; C03B35/16; C03B35/18; C03B35/181; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/20; Y; Y10; Y10T; Y10T428/00; Y10T428/21; Y10T428/25; Y10T428/251; Y10T428/29; Y10T428/2911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A highly heat-resistant disc roll comprising laminated discs, each disc comprising 20 to 90% by weight, based on the total solids, of mica particles, 1 to 35% by weight, based on the total solids, of a binder, 5 to 40% by weight, based on the total solids, of an inorganic filler and 1 to 30% by weight, based on the total solids, of a reinforcing fiber, at least 60% by weight of said mica particles having a particle size of 10 to 1,000 μm, said mica particles being phlogophite formed by cleavage of mica crystals into scales.
Claim 2
Dependent Claim
97 words
A highly heat-resistant disc roll comprising laminated discs, each disc comprising 20 to 90% by weight, based on the total solids, of mica particles, 1 to 35% by weight, based on the total solids, of a binder, 5 to 40% by weight, based on the total solids, of an inorganic filler and 1 to 30% by weight, based on the total solids, of a reinforcing fiber, at least 60% by weight of said mica particles having a particle size of 10 to 1,000 μm, said mica particles being phlogophite formed by cleavage of mica crystals into scales.
References Cited (Backward Citations)
US4416043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |