US2915598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectacle hearing aid mounting
Assignee: F P CAWLEY
•
Filing: 1954-12-14
•
Granted: 1959-12-01
•
Expires: 1974-12-14
Abstract
No abstract record available.
Inventors
- 👤 Don L Brunton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:11
CPC Classifications
G; G02; G02C; G02C11/00; G02C11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB491677A
Cited
US2207705A
Cited
FR840622A
Cited
US2647955A
Cited
US2613282A
Cited
GB723981A
Cited
US2765373A
Cited
US2789160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |