Patent US3431105A successfully refreshed from Google Patents.
US3431105A
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Process for manufacturing parts provided with a sintered surface layer
Assignee: Duria Werk Karl Kempf GmbH
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Filing: 1968-02-12
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Granted: 1969-03-04
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Expires: 1988-02-12
Abstract
No abstract record available.
Inventors
- 👤 Friedrich Heck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:47
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/006; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1103; B22F3/1109; B22F7/00; B22F7/02; B22F7/04; B23; B23K; B23K20/00; B23K20/02; F; F16; F16D; F16D69/00; B22F3/24; B22F2003/245; B29L; B29L2031/00; B29L2031/16; F16D2069/004; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12389; Y10T428/12396
Claims Analysis
Total Claims: 0
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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) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |