Patent US2734688A successfully refreshed from Google Patents.
US2734688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
sloane
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:53
CPC Classifications
B; B02; B02C; B02C4/00; B02C4/28; B02C4/286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1584622A
Cited
US308568A
Cited
US433777A
Cited
US287724A
Cited
US793683A
Cited
CH35678A
Cited
US923966A
Cited
FR413232A
Cited
US991317A
Cited
US1014383A
Cited
US1476880A
Cited
US1450723A
Cited
US2416422A
Cited
US2567389A
Cited
DK25275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |