US2072875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window envelope and method of making the same
Assignee: Individual
•
Filing: 1931-09-25
•
Granted: 1937-03-09
•
Expires: 1951-09-25
Abstract
No abstract record available.
Inventors
- 👤 Robert L Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:39
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/82; B31B70/826; B31B2150/00; B31B2160/00; B31B2160/10; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1304; Y10T156/1309
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) | 1940-03-08 | 1940-09-07 | 1941-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-08 | 1944-09-07 | 1945-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-08 | 1948-09-07 | 1949-03-09 | $7700.00 | Window Closed / Lapsed |