US3531177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binocular construction using plastic foam and magnets
Assignee: Individual
•
Filing: 1967-01-26
•
Granted: 1970-09-29
•
Expires: 1987-01-26
Abstract
No abstract record available.
Inventors
- 👤 Alfred A Akin Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:15
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/16; G02B23/18; C; C09; C09J; C09J7/00; C09J7/10; Y; Y10; Y10S; Y10S359/00; Y10S359/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE678764C
Cited
US2328603A
Cited
GB551479A
Cited
US2364811A
Cited
FR1106618A
Cited
US2940359A
Cited
US3383152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |