Patent US3577323A successfully refreshed from Google Patents.
US3577323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High quality submasters
Assignee: Xerox Corp
•
Filing: 1968-12-30
•
Granted: 1971-05-04
•
Expires: 1988-12-30
Abstract
Abstract THIS APPLICATION RELATES TO A REPLICA METAL MASTER HAVING A THIN SHEET OF METAL ELECTROFORMED IN A DESIRED SHAPE AND A RIGIDIZING STRUCTURE FOR MAINTAINING THE OPTICAL ACCURACY OF SAID SHEET, SAID RIGIDIZING STRUCTURE BEING MOUNTED ON SAID SHEET SOLELY ALONG THE EDGES THEREOF.
Inventors
- 👤 Marlowe A Pichel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:21
CPC Classifications
C; C25; C25D; C25D1/00; C25D1/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |