US3532225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible geometric structure
Assignee: Rolls Royce Power Engineering PLC
•
Filing: 1968-03-21
•
Granted: 1970-10-06
•
Expires: 1988-03-21
Abstract
No abstract record available.
Inventors
- 👤 Maude F Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:02
CPC Classifications
A; A47; A47B; A47B13/00; A47B13/02; A47F; A47F5/00; A47F5/10; A47F5/13
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US251903A
Cited
DE541052C
Cited
US1376087A
Cited
US2125985A
Cited
US2276308A
Cited
US2576883A
Cited
US2509451A
Cited
US2461622A
Cited
US2465104A
Cited
US2462991A
Cited
US3069204A
Cited
US3276731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |