US2812690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skylights
Assignee: OI Glass Inc
•
Filing: 1952-06-26
•
Granted: 1957-11-12
•
Expires: 1972-06-26
Abstract
No abstract record available.
Inventors
- 👤 Robert A Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:37
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/02; E04D3/06; E04C; E04C1/00; E04C1/42; E04C2/00; E04C2/54; E04D13/00; E04D13/03; E04D13/033; F; F21; F21S; F21S11/00; F21V; F21V5/00; F21V5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189716560A
Cited
US650209A
Cited
FR355297A
Cited
GB190620046A
Cited
US1949898A
Cited
US2179863A
Cited
US2097738A
Cited
US2099534A
Cited
US2419267A
Cited
US2665610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |