US2979007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable ramps for interconnecting spaces situated at different levels
Assignee: Ateliers et Chantiers de Bretagne ACB SA
•
Filing: 1958-08-26
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Granted: 1961-04-11
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Expires: 1978-08-26
Abstract
No abstract record available.
Inventors
- 👤 Kummerman Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:06
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/30; B63; B63B; B63B19/00; B63B19/12; B63B19/14; E; E04; E04H; E04H6/00; E04H6/08; E04H6/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1815687A
Cited
US1905947A
Cited
US2091775A
Cited
US2729185A
Cited
US2774420A
Cited
US2754014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |