US2828567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparency file
Assignee: Individual
•
Filing: 1955-09-26
•
Granted: 1958-04-01
•
Expires: 1975-09-26
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Shoan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:45
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1210215A
Cited
US1550838A
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US2127940A
Cited
US2311646A
Cited
US2334176A
Cited
US2282872A
Cited
US2528366A
Cited
US2508854A
Cited
US2750698A
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 |