US1674502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve-forming device for paper bags
Assignee: Hammond Bag & Paper Co
•
Filing: 1927-12-17
•
Granted: 1928-06-19
•
Expires: 1947-12-17
Abstract
No abstract record available.
Inventors
- 👤 Merritt J Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:23
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/84; B31B70/855; B31B70/857; B31B2160/00; B31B2160/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1931-06-19 | 1931-12-19 | 1932-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-06-19 | 1935-12-19 | 1936-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-06-19 | 1939-12-19 | 1940-06-19 | $7700.00 | Window Closed / Lapsed |