Patent US1959221A successfully refreshed from Google Patents.
US1959221A
Expired / Lapsed
US
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Method and apparatus for making safety glass
Assignee: DUPLATE Corp
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Filing: 1932-06-15
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Granted: 1934-05-15
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Expires: 1952-06-15
Abstract
No abstract record available.
Inventors
- 👤 James H Sherts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:01
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10807; B32B17/1088; B32B17/10816; B32B17/10825; B32B17/10834; B32B17/10844; B32B17/10853
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) | 1937-05-14 | 1937-11-13 | 1938-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-05-14 | 1941-11-13 | 1942-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-05-14 | 1945-11-13 | 1946-05-15 | $7700.00 | Window Closed / Lapsed |