Patent US2087609A successfully refreshed from Google Patents.
US2087609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of transparent sheet material
Assignee: Brown Co
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Filing: 1933-02-25
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Granted: 1937-07-20
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Expires: 1953-02-25
Abstract
No abstract record available.
Inventors
- 👤 George A Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:21
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/02; C08J; C08J5/00; C08J5/18; C08J2301/00; C08J2301/02
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) | 1940-07-19 | 1941-01-18 | 1941-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-07-19 | 1945-01-18 | 1945-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-07-19 | 1949-01-18 | 1949-07-20 | $7700.00 | Window Closed / Lapsed |