US2878553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rigidized electrolytically formed metal sheets
Assignee: Individual
•
Filing: 1954-06-25
•
Granted: 1959-03-24
•
Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
- 👤 Homer C Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:28
CPC Classifications
B; B21; B21D; B21D13/00; B21D13/04; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/1241; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US409050A
Cited
US1006600A
Cited
GB191222533A
Cited
US1807145A
Cited
US1868302A
Cited
US2154597A
Cited
US2377321A
Cited
US2578968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |