US2284899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making mercury switches
Assignee: BUCKLEN BEAR LAB Inc
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Filing: 1940-03-21
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Granted: 1942-06-02
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Expires: 1960-03-21
Abstract
No abstract record available.
Inventors
- 👤 Uno C Hedin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:02
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/021; C04B2235/00; C04B2235/65; C04B2235/658; C04B2235/6582; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/52; C04B2237/525; C04B2237/76; C04B2237/765; C04B2237/84; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49105
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) | 1945-06-01 | 1945-12-01 | 1946-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-01 | 1949-12-01 | 1950-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-01 | 1953-12-01 | 1954-06-02 | $7700.00 | Window Closed / Lapsed |