Patent US2076402A successfully refreshed from Google Patents.
Patent US3521883A successfully refreshed from Google Patents.
US3521883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Baseball bat with training weight
Assignee: FRANK G HAMILTON
•
Filing: 1967-11-27
•
Granted: 1970-07-28
•
Expires: 1987-11-27
Abstract
No abstract record available.
Inventors
- 👤 Frank G Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:16
CPC Classifications
A; A63; A63B; A63B60/00; A63B59/00; A63B59/50; A63B2102/00; A63B2102/18; A63B60/06; A63B60/22; A63B60/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1030982A
Cited
AT70350B
Cited
DE442206C
Cited
US1676270A
Cited
US1843039A
Cited
US2203893A
Cited
US2447218A
Cited
US2608409A
Cited
US2950115A
Cited
US3116926A
Cited
US3305234A
Cited
US3351346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |