Patent US2228315A successfully refreshed from Google Patents.
US2228315A
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Gas-delivery apparatus and method
Assignee: Leica Microsystems Inc
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Filing: 1938-02-25
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Granted: 1941-01-14
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Expires: 1958-02-25
Abstract
No abstract record available.
Inventors
- 👤 Ulric O Hutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08; Y; Y10; Y10S; Y10S116/00; Y10S116/42; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0396; Y10T137/6416; Y10T137/6606; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7835; Y10T137/7836; Y10T137/8158; Y10T137/8326
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) | 1944-01-14 | 1944-07-15 | 1945-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-14 | 1948-07-15 | 1949-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-14 | 1952-07-15 | 1953-01-14 | $7700.00 | Window Closed / Lapsed |