Patent US2215039A successfully refreshed from Google Patents.
US2215039A
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Method of treating borosilicate glasses
Assignee: Corning Glass Works
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Filing: 1934-09-20
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Granted: 1940-09-17
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Expires: 1954-09-20
Abstract
No abstract record available.
Inventors
- 👤 Hood Harrison Porter
- 👤 Nordberg Martin Emery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:46
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/02; B01D71/04; B29; B29C; B29C67/00; B44; B44F; B44F11/00; B44F11/06; C; C03; C03C; C03C11/00; C03C11/005; C03C23/00; C03C23/0095; C03C3/00; C03C3/04; C03C3/06; C03C3/061; C03C3/076; C03C3/089; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249969
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) | 1943-09-17 | 1944-03-18 | 1944-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-17 | 1948-03-18 | 1948-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-17 | 1952-03-18 | 1952-09-17 | $7700.00 | Window Closed / Lapsed |