US2087345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of window envelopes
Assignee: United States Envelope Co
•
Filing: 1933-08-31
•
Granted: 1937-07-20
•
Expires: 1953-08-31
Abstract
No abstract record available.
Inventors
- 👤 Vincent E Heywood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:57
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/82; B31B70/826; B31B2150/00; B31B2160/00; B31B2160/10; B31B70/60; B31B70/62
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 |