Patent US1972377A successfully refreshed from Google Patents.
US1972377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic demultiplying apparatus
Assignee: Individual
•
Filing: 1932-03-22
•
Granted: 1934-09-04
•
Expires: 1952-03-22
Abstract
No abstract record available.
Inventors
- 👤 Laderriere Marcel De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:51
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/04; F01; F01D; F01D1/00; F01D1/24; F01D1/28; F02; F02C; F02C6/00; F02C7/00; F16; F16H; F16H61/00; F16H61/02; F16H2718/00; F16H2718/18; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19502; Y10T74/19512; Y10T74/19633
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) | 1937-09-03 | 1938-03-05 | 1938-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-03 | 1942-03-05 | 1942-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-03 | 1946-03-05 | 1946-09-04 | $7700.00 | Window Closed / Lapsed |