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US2704486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
wilson
Assignee: —
•
Filing: —
•
Granted: 1955-03-22
•
Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:57
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/08; G03B23/12; G03B23/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US992366A
Cited
US1028692A
Cited
US1178786A
Cited
US1590704A
Cited
US1856234A
Cited
FR691545A
Cited
US2003480A
Cited
US2007561A
Cited
US2391879A
Cited
US2431662A
Cited
US2481850A
Cited
US2586176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-21 | 1958-09-20 | 1959-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-21 | 1962-09-20 | 1963-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-21 | 1966-09-20 | 1967-03-22 | $7700.00 | Window Closed / Lapsed |