Patent US4923450A successfully refreshed from Google Patents.
Patent US2242441A successfully refreshed from Google Patents.
US2242441A
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Method of making bearings
Assignee: NL Industries Inc
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Filing: 1938-08-15
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Granted: 1941-05-20
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Expires: 1958-08-15
Abstract
No abstract record available.
Inventors
- 👤 Robert J Shoemaker
- 👤 Charles M House
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:39
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/26; B61F5/30; B61F5/32; C; C22; C22C; C22C47/00; C22C47/02; C22C47/06; C22C47/062; C22C47/066; C22C49/00; C22C49/02; C22C49/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49705; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12493; Y10T428/12701; Y10T428/12708
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) | 1944-05-19 | 1944-11-18 | 1945-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-05-19 | 1948-11-18 | 1949-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-05-19 | 1952-11-18 | 1953-05-20 | $7700.00 | Window Closed / Lapsed |