Patent US1735051A successfully refreshed from Google Patents.
US3509998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic regenerating apparatus for water softener
Assignee: ROBERT G PELLETT
•
Filing: 1967-05-09
•
Granted: 1970-05-05
•
Expires: 1987-05-09
Abstract
No abstract record available.
Inventors
- 👤 William H Pellett
- 👤 Robert G Pellett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:58
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; B; B01; B01J; B01J49/00; B01J49/80; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/7478; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413; Y10T137/86493; Y10T137/86718; Y10T137/86726
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2310978A
Cited
US3056574A
Cited
US3108609A
Cited
US3154484A
Cited
US3181564A
Cited
US3326378A
Cited
US3326377A
Cited
US3307581A
Cited
US3333699A
Cited
US3293880A
Cited
US3405733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |