US3280518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hyperbolic paraboloid roof structure and method of constructing the frame thereof
Assignee: Individual
•
Filing: 1959-10-06
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Granted: 1966-10-25
•
Expires: 1979-10-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter S White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:15
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/08; E04B7/10; E04B7/102; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
A SHELL ROOF STRUCTURE INCLUDING A PAIR OF SHEETS HAVING FACES IN OPPOSED RELATIONSHIP TO EACH OTHER AND FORMING A HYPERBOLIC PARABOLOID COMPOSITE STRUCTURE, EACH SHEET HAVING A PLURALITY OF UNDULATIONS EXTENDING ALONG ONE DIMENSION THEREOF, ONE SHEET HAVING THE UNDULATIONS THEREOF EXTENDING TRANSVERSE AND AT A SUBSTANTIAL ANGLE TO THE UNDULATIONS OF THE COMPANION SHEET, AND MEANS RIGIDLY SECURING SAID SHEETS AT A PLURALITY OF MUTUALLY OPPOSED POINTS ALONG A PLURALITY OF ADJACENT UNDULATIONS OF EACH SHEET FOR RETAINING SAID SHEETS TOGETHER WITH EACH SHEET IN THE SHAPE OF A HYPERBOLIC PARABOLOID CONFORMING TO THE SHAPE OF THE OTHER OF THE SHEETS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |