US2828509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic molding machines
Assignee: Crown Machine and Tool Co Inc
•
Filing: 1954-11-03
•
Granted: 1958-04-01
•
Expires: 1974-11-03
Abstract
No abstract record available.
Inventors
- 👤 Robert E Smucker
- 👤 James M Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:08
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/72; B29C45/73; B29C45/7312; B29C45/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US780856A
Cited
US2259781A
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US2309729A
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US2296296A
Cited
US2377393A
Cited
US2396406A
Cited
US2519255A
Cited
US2617152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |