US2796634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse forming process for making shaped articles from plastic sheet material
Assignee: International Business Machines Corp
•
Filing: 1953-12-21
•
Granted: 1957-06-25
•
Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Leroy N Chellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:06
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/02; B29C43/20; B29C43/203; B29C43/14; B29C43/146; B29C51/00; B29C51/002; B29C51/14; B29C51/145; B29C70/00; B29C70/04; B29C70/28; B32; B32B; B32B27/00; B29C51/08; B29C51/082; B29K; B29K2101/00; B29K2101/10; B29K2101/12; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0809; B29K2105/0845; B29K2105/0854; Y; Y10; Y10S; Y10S264/00; Y10S264/66; Y10S425/00; Y10S425/048; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T156/1043; Y10T156/1044; Y10T156/1048; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24802
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1904718A
Cited
US2075286A
Cited
US2130359A
Cited
US2139541A
Cited
US2441961A
Cited
US2625497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |