Patent US4609859A successfully refreshed from Google Patents.
Patent US1703967A successfully refreshed from Google Patents.
US1703967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aeration apparatus and method
Assignee: Beazer East Inc
•
Filing: 1926-05-07
•
Granted: 1929-03-05
•
Expires: 1946-05-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick W Sperr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:40
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2312; B01F23/23124; C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; B01F23/2311; B01F23/23114; B01F23/231143; B01F23/23125; B01F23/231245; B01F23/23126; B01F23/231265; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87153
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) | 1932-03-04 | 1932-09-03 | 1933-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-03-04 | 1936-09-03 | 1937-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-03-04 | 1940-09-03 | 1941-03-05 | $7700.00 | Window Closed / Lapsed |