US2664818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stencil and backing unit
Assignee: 3M Co
•
Filing: 1944-12-15
•
Granted: 1954-01-05
•
Expires: 1964-12-15
Abstract
No abstract record available.
Inventors
- 👤 Charles K Heasley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:55
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/24; B41N1/242; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US783101A
Cited
US823445A
Cited
US1101258A
Cited
US1087441A
Cited
US1188937A
Cited
GB244228A
Cited
US2140482A
Cited
US2143946A
Cited
US2153755A
Cited
US2201953A
Cited
US2379741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |