US2204928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking device
Assignee: Oliver United Filters Inc
•
Filing: 1938-05-31
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Granted: 1940-06-18
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Expires: 1958-05-31
Abstract
No abstract record available.
Inventors
- 👤 Edwin S Culver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:40
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/284; B; B01; B01D; B01D33/00; B01D33/06; B01D33/067; B01D33/073; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44009; Y10T24/44034; Y10T24/44043; Y10T24/44051; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/53; Y10T29/53657
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) | 1943-06-18 | 1943-12-18 | 1944-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-18 | 1947-12-18 | 1948-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-18 | 1951-12-18 | 1952-06-18 | $7700.00 | Window Closed / Lapsed |