Patent US2420488A successfully refreshed from Google Patents.
US2420488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming laminated hollow structures
Assignee: VIDAL Corp
•
Filing: 1943-02-06
•
Granted: 1947-05-13
•
Expires: 1963-02-06
Abstract
No abstract record available.
Inventors
- 👤 Laurence J Marhoefer
- 👤 William A Taylor
- 👤 Eugene L Vidal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:29
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/02; Y; Y02; Y02T; Y02T50/00; Y02T50/40; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1031; Y10T156/1043; Y10T156/1052; Y10T156/1062; Y10T156/1066; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49947; Y10T29/49966; Y10T29/4997
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US203557A
Cited
US448870A
Cited
US1344634A
Cited
US1336011A
Cited
US1394726A
Cited
US1628886A
Cited
US1654375A
Cited
US1916051A
Cited
US1885406A
Cited
US2172093A
Cited
US2149507A
Cited
US2223587A
Cited
US2276004A
Cited
US2286267A
Cited
US2341637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |