Patent US4414039A successfully refreshed from Google Patents.
Patent US2253608A successfully refreshed from Google Patents.
US2253608A
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US
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Friction element
Assignee: Johns Manville Corp
•
Filing: 1936-12-02
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Granted: 1941-08-26
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Expires: 1956-12-02
Abstract
No abstract record available.
Inventors
- 👤 Donald S Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:50
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/021; F16D69/022; C; C09; C09K; C09K3/00; C09K3/14; C09K3/149; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-08-25 | 1945-02-24 | 1945-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-08-25 | 1949-02-24 | 1949-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-08-25 | 1953-02-24 | 1953-08-26 | $7700.00 | Window Closed / Lapsed |