US2993409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skylights
Assignee: OI Glass Inc
•
Filing: 1957-01-02
•
Granted: 1961-07-25
•
Expires: 1977-01-02
Abstract
No abstract record available.
Inventors
- 👤 Robert A Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:07
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/04; G02B5/045; E; E04; E04C; E04C2/00; E04C2/54; E04D; E04D13/00; E04D13/03; E04D13/033; E04D3/00; E04D3/02; E04D3/06; F; F21; F21S; F21S11/00; F21V; F21V5/00; F21V5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US458850A
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US586219A
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GB189716541A
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US719066A
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US650209A
Cited
US709849A
Cited
US1652347A
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US2097738A
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GB556218A
Cited
US2545906A
Cited
US2419267A
Cited
GB754619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |