US2489476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record holder
Assignee: Individual
•
Filing: 1945-10-09
•
Granted: 1949-11-29
•
Expires: 1965-10-09
Abstract
No abstract record available.
Inventors
- 👤 Ward B Blodget
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:16
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/04; G11B33/0405; G11B33/0433; G11B33/0444
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US628943A
Cited
US1539592A
Cited
US1881476A
Cited
US1764264A
Cited
US1836234A
Cited
US1831938A
Cited
US2110802A
Cited
US2278529A
Cited
US2261839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |