Patent US2703568A successfully refreshed from Google Patents.
US2703568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
birch
Assignee: —
•
Filing: —
•
Granted: 1955-03-08
•
Expires: 1972-03-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:41
CPC Classifications
F; F23; F23H; F23H9/00; F23H9/08; B; B02; B02C; B02C19/00; B02C19/0056
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US42526A
Cited
US120459A
Cited
US338305A
Cited
US423721A
Cited
US740153A
Cited
GB191108537A
Cited
US1248048A
Cited
US1598364A
Cited
US1883578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |