US2838768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain valve for plastic swimming pool
Assignee: Individual
•
Filing: 1955-05-04
•
Granted: 1958-06-17
•
Expires: 1975-05-04
Abstract
No abstract record available.
Inventors
- 👤 Fischett Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:48
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/12; E04H4/1209; E04H4/1236; A; A47; A47K; A47K1/00; A47K1/14; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/505; A61K31/506; A61K31/51; B; B65; B65D; B65D47/00; B65D47/04; B65D47/06; B65D47/12; B65D47/14; B65D47/141; E04H4/0018; E04H4/0025; Y; Y10; Y10S; Y10S297/00; Y10S297/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB190222301A
Cited
US1633197A
Cited
US2200395A
Cited
US2499150A
Cited
US2616096A
Cited
FR998208A
Cited
US2571144A
Cited
CH276582A
Cited
FR1016883A
Cited
US2690861A
Cited
US2718014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |