Patent US2188121A successfully refreshed from Google Patents.
US2188121A
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Making articles of fused silica
Assignee: Corning Glass Works
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Filing: 1936-12-11
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Granted: 1940-01-23
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Expires: 1956-12-11
Abstract
No abstract record available.
Inventors
- 👤 Rowland D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:38
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/047; C03B19/00; C03B19/01; C03B19/14; C03B19/1415; C03B19/1423; C03B19/1484; C03B2207/00; C03B2207/04; C03B2207/06; C03B2207/08; C03B2207/20; C03B2207/40; C03B2207/42; Y; Y10; Y10S; Y10S425/00; Y10S425/121
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) | 1943-01-22 | 1943-07-24 | 1944-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-22 | 1947-07-24 | 1948-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-22 | 1951-07-24 | 1952-01-23 | $7700.00 | Window Closed / Lapsed |