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Patent US3449103A successfully refreshed from Google Patents.
US3449103A
Expired / Lapsed
US
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Photochromic glass making
Assignee: Corning Glass Works
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Filing: 1965-12-20
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Granted: 1969-06-10
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Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 Stanley D Stookey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:35
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/04; C03C4/06; Y; Y10; Y10S; Y10S430/00; Y10S430/163
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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |