Patent US2997778A successfully refreshed from Google Patents.
US2997778A
Expired / Lapsed
US
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Apparatus for assembling and securing ball bearings within a retainer
Assignee: Lempco Industries Inc
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Filing: 1958-04-01
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Granted: 1961-08-29
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Expires: 1978-04-01
Abstract
No abstract record available.
Inventors
- 👤 Barkley Charles Rex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:15
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/38; F16C33/40; F16C29/00; F16C29/04; F16C43/00; F16C43/04; F16C43/06; F16C43/08; F16C43/083; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49853; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918; Y10T29/53; Y10T29/53104; Y10T29/53109; Y10T29/53478; Y10T29/53522
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US848776A
Cited
US1419519A
Cited
US1627965A
Cited
US1991723A
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US2216878A
Cited
US2646761A
Cited
US2765686A
Cited
US2897582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |