US3519522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strengthening of photosensitive glass articles
Assignee: Corning Glass Works
•
Filing: 1966-12-21
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Granted: 1970-07-07
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Expires: 1986-12-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph Ference
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:27
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/0042; B; B41; B41C; B41C3/00; B41C3/04; C; C03; C03C; C03C14/00; C03C14/006; C03C15/00; C03C23/00; C03C4/00; C03C4/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/24992
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |