US2026165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for producing case hardened glass
Assignee: Libbey Owens Ford Glass Co
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Filing: 1934-08-01
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Granted: 1935-12-31
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Expires: 1954-08-01
Abstract
No abstract record available.
Inventors
- 👤 David H Goodwillie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:19
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/052
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) | 1938-12-30 | 1939-07-01 | 1939-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-12-30 | 1943-07-01 | 1943-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-12-30 | 1947-07-01 | 1947-12-31 | $7700.00 | Window Closed / Lapsed |