Patent US3542572A successfully refreshed from Google Patents.
US3542572A
Expired / Lapsed
US
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Germania-silica glasses
Assignee: Corning Glass Works
•
Filing: 1968-06-24
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Granted: 1970-11-24
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Expires: 1988-06-24
Abstract
No abstract record available.
Inventors
- 👤 Robert H Dalton
- 👤 Eugene F Riebling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:57
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/69; H10P14/692; H10P14/6921; H10P14/6922; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C4/00; H10P14/63; H10P14/6326; H10P14/6342; H10P14/65; H10P14/6516; H10P14/6544; H10P14/69215; H10W; H10W74/00; H10W74/10; H10W74/131; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/118
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3255120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |