US3423823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making thin diaphragms
Assignee: HP Inc
•
Filing: 1965-10-18
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Granted: 1969-01-28
•
Expires: 1985-10-18
Abstract
No abstract record available.
Inventors
- 👤 William G Ansley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:19
CPC Classifications
H; H10; H10P; H10P95/00; H10P10/00; Y; Y10; Y10S; Y10S148/00; Y10S148/051; Y10S148/085; Y10S438/00; Y10S438/928; Y10S438/977
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |