Patent US3383709A successfully refreshed from Google Patents.
US3383709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable headpiece
Assignee: Keystone Adjustable Co
•
Filing: 1966-06-16
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Granted: 1968-05-21
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Expires: 1986-06-16
Abstract
No abstract record available.
Inventors
- 👤 Richard I Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:44
CPC Classifications
A; A42; A42B; A42B1/00; A42B1/012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA578238A
Cited
US1663124A
Cited
US2669725A
Cited
US2759191A
Cited
US2856608A
Cited
US3082430A
Cited
GB962355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |