US3521280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coded labels
Assignee: General Research Corp
•
Filing: 1969-01-16
•
Granted: 1970-07-21
•
Expires: 1989-01-16
Abstract
No abstract record available.
Inventors
- 👤 Maurice Janco
- 👤 Arnold T Nordsieck
- 👤 Charles W Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:36
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10009; B; B07; B07C; B07C3/00; B07C3/10; B07C3/12; B65; B65G; B65G47/00; B65G47/34; B65G47/46; B65G47/48; B65G47/49; G06K19/00; G06K19/06; G06K19/067; G06K19/0672
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |