US1815992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making curved composite glass plates
Assignee: DUPLATE Corp
•
Filing: 1930-04-24
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Granted: 1931-07-28
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Expires: 1950-04-24
Abstract
No abstract record available.
Inventors
- 👤 James H Sherts
- 👤 Willits John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:54
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10807; B32B17/10816; B32B17/10825; B32B17/10834; B32B17/10844; B32B17/10853; B32B17/1088; B32B17/10889
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) | 1934-07-27 | 1935-01-26 | 1935-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-27 | 1939-01-26 | 1939-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-27 | 1943-01-26 | 1943-07-28 | $7700.00 | Window Closed / Lapsed |